en

Φe

1 symbol

Terminological databases

Metroloogia terminibaas

ID 573861 Last modified 26.09.2026
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Domain Standardisation - Metrology
soojusvoog preferred
kiirgusvoog
energeetiline valgusvoog
Φe
soojusvool former
heat flux
radiant flux
Φe
heat flow
heat current
flux of radiation
radiant power
radiant energy flux
thermal flux
thermal flow
  • soojushulk, mis kandub ajaühikus läbi vaadeldava pinna pindalaühiku
  • ISQ tuletatud suurus
  • amount of heat through a surface during a time interval divided by the duration of this interval
  • ISQ derived quantity
soojusvoog preferred
Usage examples
  • Soojusvoog on võrdeline temperatuuri gradiendiga, kus võrdeteguriks on soojusjuhtivustegur.
kiirgusvoog
energeetiline valgusvoog
Φe symbol
Usage examples
  • Soojusvoo või kiirgusvoo standardtähis on Φe või lihtsalt Φ, kusjuures indeks e tähistab energeetilist või kiirguslikku suurust, eristamaks seda energeetilisest valgusvoost Φv. Üldises kontekstis kasutatakse sageli tähist Φ.
soojusvool former
heat flux
Usage examples
  • Heat flux is proportional to the temperature gradient, with the thermal conductivity serving as the proportionality constant.
radiant flux
Φe symbol
Usage examples
  • The standard symbol for radiant flux or for heat flux is Φe or simply Φ, and the subscript e stands for energetic/radiant to distinguish it from luminous flux, Φv. Often shortened to Φ in general contexts.
heat flow
heat current
flux of radiation
radiant power
radiant energy flux
thermal flux
thermal flow
thermal current former

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