Heat transfer coefficient - Wikipedia
In thermodynamics, the heat transfer coefficient or film coefficient, or film effectiveness, is the proportionality constant between the heat flux and the thermodynamic driving force for the flow of heat (i.e., the temperature difference, ΔT).
Heat Transfer Terminology - Engineering Library
The rate at which heat is transferred is represented by the symbol \( \dot{Q} \). Common units for heat transfer rate is Btu/hr. Sometimes it is important to determine the heat transfer rate per unit area, or heat flux, which has the symbol \( \dot{Q}'' \). Units for heat flux are Btu/hr-ft 2. The heat flux can be determined by dividing the ...
Got Unicode (3.0) | Glyph du Jour: Thermodynamic Q-dot
2008年11月21日 · It’s a capital Q with a dot above representing “heat transfer per unit time” (or rate of heat transfer). Similar thermodynamic symbols are Ẇ (rate of work produced) and ṁ (rate of mass transfer)…and interestingly these DO exist in Unicode.
Heat Flux - Heat Transfer - Engineers Edge
The rate at which heat is transferred is represented by the symbol Q . Common units for heat ˙Q transfer rate is Btu/hr. Sometimes it is important to determine the heat transfer rate per unit area, or heat flux, which has the symbol Q". Units for heat flux are Btu/hr-ft 2.
Definition of Symbols Used in Conduction Theory - eFunda
Total heat tranfered through area A is the heat flux integrated over A and the time interval. Total heat generated in volume V is the heat generation rate integrated over V and the time interval. Heat transfer rate across an area A is the heat flux integrated over A .
Rate of heat flow - Wikipedia
The rate of heat flow is the amount of heat that is transferred per unit of time in some material, usually measured in watts (joules per second). Heat is the flow of thermal energy driven by thermal non-equilibrium, so the term 'heat flow' is a redundancy (i.e. a pleonasm).
HEAT TRANSFER SYMBOLS AND FORMULAS CLASS NOTES
2018年4月25日 · Heat transfer is heat in motion. The driving force for heat transfer is temperature difference. Heat flows from a body at higher temperature to a body at lower temperature.