Glossary entry (derived from question below)
French term or phrase:
éclairement énergétique défini
English translation:
predetermined/given irradiance/{thermal load}
Added to glossary by
Carol Gullidge
Aug 12, 2007 11:16
16 yrs ago
3 viewers *
French term
United Kingdom
poetically precise prose with... panache
Native in: English 
Works in: French to English, Spanish to English, English
éclairement énergétique défini
French to English
Tech/Engineering
Science (general)
PHYSICS, fire-resistance test
WITH SINCERE APOLOGIES TO MEDIAMATRIX who valiantly answered this same question posted late last night, but in the wrong section. I feel that Building and Construction was a misleading heading, even though this is about testing building materials...
L'éprouvette du matériau de dimensions ... disposée à 45° par rapport à l'horizontale est soumise à un ***** éclairement énergétique défini *****, émis par un épiradiateur dont la surface radiante est à 30 mm du plan inférieur de l'éprouvette et parallèle à ce dernier
In this case the éclairement énergétique refers to heat (from the epiradiator) rather than to light...
Is there a special term for this in English?
My efforts so far produce "predermined thermal energy", which gets a few google hits, but I'm not convinced. The section is about subjecting materials to heat sources in order to test for fire-resistance.
Many thanks!
L'éprouvette du matériau de dimensions ... disposée à 45° par rapport à l'horizontale est soumise à un ***** éclairement énergétique défini *****, émis par un épiradiateur dont la surface radiante est à 30 mm du plan inférieur de l'éprouvette et parallèle à ce dernier
In this case the éclairement énergétique refers to heat (from the epiradiator) rather than to light...
Is there a special term for this in English?
My efforts so far produce "predermined thermal energy", which gets a few google hits, but I'm not convinced. The section is about subjecting materials to heat sources in order to test for fire-resistance.
Many thanks!
Proposed translations
(English)
Change log
Aug 14, 2007 11:13: Carol Gullidge changed "Edited KOG entry" from "<a href="/profile/134264">Carol Gullidge's</a> old entry - "éclairement énergétique défini"" to ""[predetermined, given, etc.] irradiance""
Aug 17, 2007 21:51: Carol Gullidge changed "Edited KOG entry" from "<a href="/profile/134264">Carol Gullidge's</a> old entry - "éclairement énergétique défini"" to ""predetermined/given irradiance""
Proposed translations
30 mins
Anton Konashenok
Czech Republic
Czech Republic
Native in English
Works in field
Czech Republic
Competing on quality, not on price
Native in: Russian 
, English
Works in: French to English, Czech to English, Danish to English, and 10 more.
Related KudoZ points
:
4
Selected
[predetermined, certain, etc.] irradiance
éclairement = illuminance (lux)
éclairement énergétique = irradiance (W/m2)
éclairement énergétique = irradiance (W/m2)
4 KudoZ points awarded for this answer.
Comment: "Thanks, Anton! Given all the valid answers, this seems the neatest expression!"
1 hr
Diane de Cicco
France
France
Native in French
&
English
Specializes in field
France
Specialty: Biology, Chemistry, Medicine
Native in: English , French
Works in: English to French, French to English
defined radiated energy
Given that this energy is emitted by a radiator...
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Note added at 1 hr (2007-08-12 12:18:46 GMT)
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or "defined radiation energy"
--------------------------------------------------
Note added at 1 hr (2007-08-12 12:18:46 GMT)
--------------------------------------------------
or "defined radiation energy"
Peer comment(s):
| disagree |
Anton Konashenok
: This is not energy but rather energy per unit time per unit area
3 mins
|
|
yes, that is understood by the word defined, I am only translating the French as it is in the original text
|
|
| agree |
:::::::::: (X)
: No need to put a disagree, neutral would have been enough
23 mins
|
|
Thanks
|
45 mins
given (just for change) heat flux
Possibly with "radiant heat flux" since convection also comes into it, apparently.
L'intensité de l'énergie que le RAYONNEMENT émis par le Soleil apporte à la Terre en un point donné de sa surface ou de son atmosphère peut être évaluée à chaque instant par une grandeur physique, L'ECLAIREMENT ENERGETIQUE en ce point, qui est mesurable EN WATTS PAR METRE CARRE (abr. : W.m - 2 ).
http://www.meteofrance.com/FR/glossaire/designation/124_curi...
The IMO Surface Flammability Test is similar to the ISO Spread of Flame Test (which is also used in Italy to test building materials), but uses higher RADIATION FLUX DENSITIES
[ ... ]
An application-oriented specimen is positioned horizontally on a grate underneath the epiradiateur. An EPIRADIATEUr is an electric heater that IRRADIATES the specimen with an intensity of 30 kW/m²
pc-films.com/pc-films/emea/en/docguard/KU21162.pdf?docId=2018
Epiradiateur` is a test method to evaluate the inflammability of building materials, to evaluate to what level the testmaterial can contribute to (the start of) a fire.
[0135] The test sample, 400*300 mm is positioned under an angle of 45.degree., the side to be tested downwards, into a test cabinet with controlled air inlet. The sample is exposed to an electrical radiator as the heat source, with HEAT FLUX 30 kW/m.sup.2. The heat source is positioned under the test sample, parallel to it. (Pilot lights can be installed too, in order to detect and burn released gasses.)
http://www.freshpatents.com/Flame-retardant-composition-dt20...
Total HEAT FLUX gauges are widely employed in fire research and fire testing laboratories. Several fire laboratories have developed systems for calibrating ...
www.fire.nist.gov/bfrlpubs/fire05/art024.html
Charring rate of wood exposed to a constant HEAT FLUX . Wood and fire safety : 3rd International Scientific Conference: proceedings, May 6-9, 1996, ...
www.treesearch.fs.fed.us/pubs/5978
HFM such as Gardon gauges or Schmidt–Boelter (SB) metres are used routinely in fire tests to measure total HEAT FLUX by radiation and convection. ...
linkinghub.elsevier.com/retrieve/pii/S0379711206001093
BEWARE of "radiation flux density" :
Radiation flux is a measure of the flow of radiation from a given RADIOACTIVE source.
Radiation flux density is a related measure that adds areal dimensions to the above definition - for example, radiation-flux/square-centimeter
[Wiki]
But poss. OK qualified with "thermal" :
Development of THERMAL RADIATION FLUX DENSITY in time. for various normal combustion in an oxygen-hydrogen fire. ball. From this point on the source data ...
pdf.aiaa.org/GetFileGoogle.cfm?gID=10677&gTable=mtgpaper
RADIANT HEAT FLUX: The amount of heat flowing through a given area in a given time, usually expressed as calories/square centimeter/SECOND
http://www.fs.fed.us/r6/fremont/scofmp/glossary.html [Glossary of Wildland Fire Terms]
HEAT FLUX (kW/m2)
The amount of thermal energy emitted, transmitted or received per unit area and UNIT TIME
("This glossary is partially inspired from the ISO 13943: 2000 -fire safety –vocabulary")
http://www.specialchem4polymers.com/tc/Flame-Retardants/inde...
--------------------------------------------------
Note added at 5 hrs (2007-08-12 16:20:07 GMT)
--------------------------------------------------
FWIW, if you believe in Google hits:
epiradiateur + "heat flux" = 27
epiradiateur + "irradiance" = 6
epiradiateur + "energy flux density" = 0
"fire testing" + "heat flux" = 13,400
"fire testing" + "irradiance" = 387
"fire testing" + "energy flux density" = 2
I suspect the other terms given may be right, in the absolute, in given fields, but in relation to fire testing "heat flux" wins the day by my book. A nag in one man's paddock is a thoroughbred in another man's stable.
--------------------------------------------------
Note added at 6 hrs (2007-08-12 18:02:13 GMT)
--------------------------------------------------
Besides, ("standard heat source" + "energy flux density") doesn't get any ghits either (though I will be the first to admit that ghits are merely a guide, not proof).
L'intensité de l'énergie que le RAYONNEMENT émis par le Soleil apporte à la Terre en un point donné de sa surface ou de son atmosphère peut être évaluée à chaque instant par une grandeur physique, L'ECLAIREMENT ENERGETIQUE en ce point, qui est mesurable EN WATTS PAR METRE CARRE (abr. : W.m - 2 ).
http://www.meteofrance.com/FR/glossaire/designation/124_curi...
The IMO Surface Flammability Test is similar to the ISO Spread of Flame Test (which is also used in Italy to test building materials), but uses higher RADIATION FLUX DENSITIES
[ ... ]
An application-oriented specimen is positioned horizontally on a grate underneath the epiradiateur. An EPIRADIATEUr is an electric heater that IRRADIATES the specimen with an intensity of 30 kW/m²
pc-films.com/pc-films/emea/en/docguard/KU21162.pdf?docId=2018
Epiradiateur` is a test method to evaluate the inflammability of building materials, to evaluate to what level the testmaterial can contribute to (the start of) a fire.
[0135] The test sample, 400*300 mm is positioned under an angle of 45.degree., the side to be tested downwards, into a test cabinet with controlled air inlet. The sample is exposed to an electrical radiator as the heat source, with HEAT FLUX 30 kW/m.sup.2. The heat source is positioned under the test sample, parallel to it. (Pilot lights can be installed too, in order to detect and burn released gasses.)
http://www.freshpatents.com/Flame-retardant-composition-dt20...
Total HEAT FLUX gauges are widely employed in fire research and fire testing laboratories. Several fire laboratories have developed systems for calibrating ...
www.fire.nist.gov/bfrlpubs/fire05/art024.html
Charring rate of wood exposed to a constant HEAT FLUX . Wood and fire safety : 3rd International Scientific Conference: proceedings, May 6-9, 1996, ...
www.treesearch.fs.fed.us/pubs/5978
HFM such as Gardon gauges or Schmidt–Boelter (SB) metres are used routinely in fire tests to measure total HEAT FLUX by radiation and convection. ...
linkinghub.elsevier.com/retrieve/pii/S0379711206001093
BEWARE of "radiation flux density" :
Radiation flux is a measure of the flow of radiation from a given RADIOACTIVE source.
Radiation flux density is a related measure that adds areal dimensions to the above definition - for example, radiation-flux/square-centimeter
[Wiki]
But poss. OK qualified with "thermal" :
Development of THERMAL RADIATION FLUX DENSITY in time. for various normal combustion in an oxygen-hydrogen fire. ball. From this point on the source data ...
pdf.aiaa.org/GetFileGoogle.cfm?gID=10677&gTable=mtgpaper
RADIANT HEAT FLUX: The amount of heat flowing through a given area in a given time, usually expressed as calories/square centimeter/SECOND
http://www.fs.fed.us/r6/fremont/scofmp/glossary.html [Glossary of Wildland Fire Terms]
HEAT FLUX (kW/m2)
The amount of thermal energy emitted, transmitted or received per unit area and UNIT TIME
("This glossary is partially inspired from the ISO 13943: 2000 -fire safety –vocabulary")
http://www.specialchem4polymers.com/tc/Flame-Retardants/inde...
--------------------------------------------------
Note added at 5 hrs (2007-08-12 16:20:07 GMT)
--------------------------------------------------
FWIW, if you believe in Google hits:
epiradiateur + "heat flux" = 27
epiradiateur + "irradiance" = 6
epiradiateur + "energy flux density" = 0
"fire testing" + "heat flux" = 13,400
"fire testing" + "irradiance" = 387
"fire testing" + "energy flux density" = 2
I suspect the other terms given may be right, in the absolute, in given fields, but in relation to fire testing "heat flux" wins the day by my book. A nag in one man's paddock is a thoroughbred in another man's stable.
--------------------------------------------------
Note added at 6 hrs (2007-08-12 18:02:13 GMT)
--------------------------------------------------
Besides, ("standard heat source" + "energy flux density") doesn't get any ghits either (though I will be the first to admit that ghits are merely a guide, not proof).
Note from asker:
| Once more into the breach dear Bourth, and many thanks! I'm just uncertain that "flux" can come into the equation, since, presumably, that would indicate movement/flow of heat, whereas this article is talking here about a heat source - although, on 2 thoughts, I think I see what you mean... |
Peer comment(s):
| neutral |
Anton Konashenok
: This is radiant heat flux indeed, but there is a standardized one-word term for it.
20 mins
|
| neutral |
Jennifer Levey
: I wouldn't expect and Ghits for "epiradiateur" in French + "energy flux density" in English. And the English 'epiradiator' is an anglicization of the French 'epiradiateur', when we would normally write 'standard heat source'.
5 hrs
|
|
The épiradiateur appears to be a French device, used in a particular way, and English texts refer to it as such.
|
+1
3 hrs
Jennifer Levey
Chile
Chile
Native in English
Chile
Human-scale Globalization
Native in: English (Variant: British)
Works in: Spanish to English, French to English, English to Spanish, and 2 more.
predtermined energy flux density
I stand by my original answer, which I take the liberty of repeating here so others can compare it with their own answers and comment if appropriate.
*****
predtermined energy flux density
'energy flux density' is the general term that can be used for any form of energy (light, heat, sound, etc.)
Stefan–Boltzmann law - Wikipedia, the free encyclopediaHe learned from the data of Charles Soret (1854–1904) that the energy flux density from the Sun is 29 times greater than the energy flux density of a warmed ...
en.wikipedia.org/wiki/Stefan-Boltzmann_law - 43k - Cached - Similar pages
[PDF] energy flux densityFile Format: PDF/Adobe Acrobat - View as HTML
energy flux density. For mono-directional radiation, the energy traversing in a time interval. over a small area perpendicular to the direction of the ...
iupac.org/goldbook/E02106.pdf - Similar pages
HRC - Energy Flux Density to Count Rate Conversion Factors (ECF)Using the appropriate graph, the HRC (S or I) count rate can be estimated from the incident (unabsorbed) X-ray energy flux density Fx,unab. ...
hea-www.harvard.edu/HRC/calib/ecf/ecf.html - 5k - Cached - Similar pages
MEASURMENT OF ENERGY FLUX DENSITY DISTRIBUTION IN THE FOCUS OF AN ...A calorimeter for mapping flux density in a focal volume is described. The design is based on an earlier design by Broido and Willoughby.
stinet.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0404494 - 4k - Cached - Similar pages
[PDF] Measurement of acoustic energy flux densityFile Format: PDF/Adobe Acrobat
In this article we propose a procedure for determining the energy flux density W with. the use of a system for unidirectional reception in space; ...
www.springerlink.com/index/K35T303621712V26.pdf - Similar pages
[PDF] Energy flux density and the reciprocity principle for ...File Format: PDF/Adobe Acrobat
for the energy flux density vector P in absorbing uniaxial crystals. ... Thus the time-average energy flux density vector of uniform waves is parallel to ...
www.springerlink.com/index/NT40850022T42177.pdf - Similar pages
[ More results from www.springerlink.com ]
****
--------------------------------------------------
Note added at 3 hrs (2007-08-12 14:37:59 GMT)
--------------------------------------------------
PS for Carol: If you'd classified this in an engineering field that involves things that radiate energy, such as telecoms, rather than in the theoretical area of 'physics', you would have seen that this is one of my specialist topics (30 years working with broadcast transmission systems).
--------------------------------------------------
Note added at 3 hrs (2007-08-12 15:14:05 GMT)
--------------------------------------------------
The 'density' comes from the fact that - as explained in Bourth's first web reference - energy flux density is measured in *watts per square metre*.
For the purposes of your source text, you could probably consider Bourth's answer and mine as synonymous (and anyone knowledgeable about fire-resistance testing will certainly know what's meant), although a pedant building telecoms satellites might not entirely agree :) .
--------------------------------------------------
Note added at 5 hrs (2007-08-12 17:12:12 GMT)
--------------------------------------------------
If anyone's wondering what an 'epiradiateur' looks like, there a photo here:
http://www.ais.fr/uk/uk_labo/class_m/polynormes505.html
--------------------------------------------------
Note added at 9 hrs (2007-08-12 20:42:11 GMT)
--------------------------------------------------
FWIW, there's support in the following references for the fact that epiradiatOR/EUR is something specifically French, and that the more usual term in English is "radiant heat source":
[PDF] Couv. SOLEF 1999 XPressFile Format: PDF/Adobe Acrobat - View as HTML
The French epiradiator test consists of exposing a. specimen to the action of a radiant heat source of. 3 W/cm. 2. , in the presence of a pilot flame so as ...
www.solvayplumbing.com/static/wma/pdf/3/3/4/solef_environme... - Similar pages
Polypropylene-based composition for fire resistant plastic ...[0102] To test their fire resistance, the samples prepared are subjected to the action of a radiating heat source and the ignition of the gases given off ...
www.freepatentsonline.com/20040106714.html - 35k - Cached - Similar pages
Phenolic resin based laminate materials and procedure for their ...vinylester resin 81.65% film formation elements 0.78% flame retardant agents ... better resistance to fire, corresponding to epiradiator classification M1. ...
www.freepatentsonline.com/4726996.html - 50k - Cached - Similar pages
[PDF] Journal of Fire SciencesFile Format: PDF/Adobe Acrobat
Polyetherpolyol Acting as a Permanent Active Fire Retardant .... fire. test. regulations,. like the French. epiradiator. test. .... source was a ...
jfs.sagepub.com/cgi/reprint/3/1/35.pdf - Similar pages
[PDF] Solef & Hylar PVDFFile Format: PDF/Adobe Acrobat
applications. Epiradiator test. (nF P 92-50 ). the French epiradiator test consists of exposing. a specimen to a radiant heat source of 3 W/cm ...
www.solvaysolexis.com/static/wma/pdf/9/2/2/3/BR_Solef_Hylar... - Similar pages
[PDF] Development of an Improved Radiant Heat Source for Fire TestingFile Format: PDF/Adobe Acrobat
AN IMPROVED RADIANT HEAT SOURCE FOR FIRE TESTING. It will be noted that when used with natural gas as a. fuel the panel is capable of operating from 2 W cm- ...
doi.wiley.com/10.1002/fam.810060206 - Similar pages
warringtonfire - Burning behaviour of floor coverings, using a ...Testing : Reaction to Fire Testing : European tests : Burning behaviour of ... Burning behaviour of floor coverings, using a radiant heat source (BS EN ISO ...
www.warringtonfire.net/Default.asp?DepartmentID=3&SectionID... - 12k - Cached - Similar pages
Pavus - Dokumenty hledáníThe resulting new accredited Fire Testing Laboratory (1026) performs tests in the ... determination of burning behaviour using a radiant heat source ...
www.pavus.cz/index.php?lang=en&sec=adv_redaction&r_cat=1&s_... - 15k - Cached - Similar pages
FTT Main TemplateFire Testing Technology based in East Grinstead,UK manufactures fire test ... Thyrister control for radiant heat source - Flow control for burners ...
www.fire-testing.com/html/instruments/osu.htm - 14k - Cached - Similar pages
*****
predtermined energy flux density
'energy flux density' is the general term that can be used for any form of energy (light, heat, sound, etc.)
Stefan–Boltzmann law - Wikipedia, the free encyclopediaHe learned from the data of Charles Soret (1854–1904) that the energy flux density from the Sun is 29 times greater than the energy flux density of a warmed ...
en.wikipedia.org/wiki/Stefan-Boltzmann_law - 43k - Cached - Similar pages
[PDF] energy flux densityFile Format: PDF/Adobe Acrobat - View as HTML
energy flux density. For mono-directional radiation, the energy traversing in a time interval. over a small area perpendicular to the direction of the ...
iupac.org/goldbook/E02106.pdf - Similar pages
HRC - Energy Flux Density to Count Rate Conversion Factors (ECF)Using the appropriate graph, the HRC (S or I) count rate can be estimated from the incident (unabsorbed) X-ray energy flux density Fx,unab. ...
hea-www.harvard.edu/HRC/calib/ecf/ecf.html - 5k - Cached - Similar pages
MEASURMENT OF ENERGY FLUX DENSITY DISTRIBUTION IN THE FOCUS OF AN ...A calorimeter for mapping flux density in a focal volume is described. The design is based on an earlier design by Broido and Willoughby.
stinet.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0404494 - 4k - Cached - Similar pages
[PDF] Measurement of acoustic energy flux densityFile Format: PDF/Adobe Acrobat
In this article we propose a procedure for determining the energy flux density W with. the use of a system for unidirectional reception in space; ...
www.springerlink.com/index/K35T303621712V26.pdf - Similar pages
[PDF] Energy flux density and the reciprocity principle for ...File Format: PDF/Adobe Acrobat
for the energy flux density vector P in absorbing uniaxial crystals. ... Thus the time-average energy flux density vector of uniform waves is parallel to ...
www.springerlink.com/index/NT40850022T42177.pdf - Similar pages
[ More results from www.springerlink.com ]
****
--------------------------------------------------
Note added at 3 hrs (2007-08-12 14:37:59 GMT)
--------------------------------------------------
PS for Carol: If you'd classified this in an engineering field that involves things that radiate energy, such as telecoms, rather than in the theoretical area of 'physics', you would have seen that this is one of my specialist topics (30 years working with broadcast transmission systems).
--------------------------------------------------
Note added at 3 hrs (2007-08-12 15:14:05 GMT)
--------------------------------------------------
The 'density' comes from the fact that - as explained in Bourth's first web reference - energy flux density is measured in *watts per square metre*.
For the purposes of your source text, you could probably consider Bourth's answer and mine as synonymous (and anyone knowledgeable about fire-resistance testing will certainly know what's meant), although a pedant building telecoms satellites might not entirely agree :) .
--------------------------------------------------
Note added at 5 hrs (2007-08-12 17:12:12 GMT)
--------------------------------------------------
If anyone's wondering what an 'epiradiateur' looks like, there a photo here:
http://www.ais.fr/uk/uk_labo/class_m/polynormes505.html
--------------------------------------------------
Note added at 9 hrs (2007-08-12 20:42:11 GMT)
--------------------------------------------------
FWIW, there's support in the following references for the fact that epiradiatOR/EUR is something specifically French, and that the more usual term in English is "radiant heat source":
[PDF] Couv. SOLEF 1999 XPressFile Format: PDF/Adobe Acrobat - View as HTML
The French epiradiator test consists of exposing a. specimen to the action of a radiant heat source of. 3 W/cm. 2. , in the presence of a pilot flame so as ...
www.solvayplumbing.com/static/wma/pdf/3/3/4/solef_environme... - Similar pages
Polypropylene-based composition for fire resistant plastic ...[0102] To test their fire resistance, the samples prepared are subjected to the action of a radiating heat source and the ignition of the gases given off ...
www.freepatentsonline.com/20040106714.html - 35k - Cached - Similar pages
Phenolic resin based laminate materials and procedure for their ...vinylester resin 81.65% film formation elements 0.78% flame retardant agents ... better resistance to fire, corresponding to epiradiator classification M1. ...
www.freepatentsonline.com/4726996.html - 50k - Cached - Similar pages
[PDF] Journal of Fire SciencesFile Format: PDF/Adobe Acrobat
Polyetherpolyol Acting as a Permanent Active Fire Retardant .... fire. test. regulations,. like the French. epiradiator. test. .... source was a ...
jfs.sagepub.com/cgi/reprint/3/1/35.pdf - Similar pages
[PDF] Solef & Hylar PVDFFile Format: PDF/Adobe Acrobat
applications. Epiradiator test. (nF P 92-50 ). the French epiradiator test consists of exposing. a specimen to a radiant heat source of 3 W/cm ...
www.solvaysolexis.com/static/wma/pdf/9/2/2/3/BR_Solef_Hylar... - Similar pages
[PDF] Development of an Improved Radiant Heat Source for Fire TestingFile Format: PDF/Adobe Acrobat
AN IMPROVED RADIANT HEAT SOURCE FOR FIRE TESTING. It will be noted that when used with natural gas as a. fuel the panel is capable of operating from 2 W cm- ...
doi.wiley.com/10.1002/fam.810060206 - Similar pages
warringtonfire - Burning behaviour of floor coverings, using a ...Testing : Reaction to Fire Testing : European tests : Burning behaviour of ... Burning behaviour of floor coverings, using a radiant heat source (BS EN ISO ...
www.warringtonfire.net/Default.asp?DepartmentID=3&SectionID... - 12k - Cached - Similar pages
Pavus - Dokumenty hledáníThe resulting new accredited Fire Testing Laboratory (1026) performs tests in the ... determination of burning behaviour using a radiant heat source ...
www.pavus.cz/index.php?lang=en&sec=adv_redaction&r_cat=1&s_... - 15k - Cached - Similar pages
FTT Main TemplateFire Testing Technology based in East Grinstead,UK manufactures fire test ... Thyrister control for radiant heat source - Flow control for burners ...
www.fire-testing.com/html/instruments/osu.htm - 14k - Cached - Similar pages
Note from asker:
| thanks again, and I'm glad to se you back with this one! But can you explain where the "density" fits in with a heat source? In wds of 1 syllable, I'm afraid...! |
| I'm sorry to be so thick, and I had no idea it could be connected to telecoms, as it's related to testing building materials for fire resistance! It's quite hard sometimes to know how to categorize these questions... To me, heat radiation came into my 'A' level Physics - you couldn't study telecoms in those days! |
| Hi again! Correct me if I've got this wrong, but to me "energy flux density" indicates "the density of the energy flux", ie a measurement of the energy flux. I can't reconcile a measurement/density as being the actual (source of ) heat, or even the heat itself. But I'm trying to get to grips with all this... |
| thanks for the further explanations! getting clearer all the time! |
Discussion
Anton's answer seems to put it in a nutshell...
But the fact that 3 of these brilliant answers are pretty much synonymous is going to make grading horribly difficult when the time comes
Thanks for all 4 helpful answers posted so far! I'm trying to figure out whether they nearly all say the same thing, but expressed differently...