Full Answer
What is heat flux?
through a surface. Heat flux or thermal flux, sometimes also referred to as heat flux density, heat-flow density or heat flow rate intensity is a flow of energy per unit of area per unit of time. In SI its units are watts per square metre (W/m 2 ). It has both a direction and a magnitude, and so it is a vector quantity.
Is heat flux vector or scalar quantity?
It has both a direction and a magnitude, and so it is a vector quantity. To define the heat flux at a certain point in space, one takes the limiting case where the size of the surface becomes infinitesimally small. , the subscript q specifying heat flux, as opposed to mass or momentum flux.
How do you find the heat flux through insulation?
Diagram depicting heat flux through a thermal insulation material with thermal conductivity, k, and thickness, x. Heat flux can be determined using two surface temperature measurements on either side of the material using temperature sensors if k and x of the material are also known.
Why calibrate a heat flux sensor?
Once the heat flux sensor is calibrated it can then be used to directly measure heat flux without requiring the rarely known value of thermal resistance or thermal conductivity. One of the tools in a scientist's or engineer's toolbox is the energy balance.
What is heat flux?
Heat flux or thermal flux, sometimes also referred to as heat flux density, heat-flow density or heat flow rate intensity is a flow of energy per unit of area per unit of time. In SI its units are watts per square metre (W/m 2 ). It has both a direction and a magnitude, and so it is a vector quantity. To define the heat flux at a certain point in space, one takes the limiting case where the size of the surface becomes infinitesimally small.
How to determine heat flux?
Diagram depicting heat flux through a thermal insulation material with thermal conductivity, k, and thickness, x. Heat flux can be determined using two surface temperature measurements on either side of the material using temperature sensors if k and x of the material are also known.
How is heat transported in solids?
For most solids in usual conditions, heat is transported mainly by conduction and the heat flux is adequately described by Fourier's law.
What is the flow of a quantity?
^ The word "flux" is used in most physical disciplines to refer to the flow of a quantity (mass, heat, momentum, etc.) across a surface per unit time per unit area, with the primary exception being in electromagnetism, where it refer to the integral of a vector quantity through an surface. Refer to the article Flux for more detail.
Can heat rate be used to calculate energy balance?
Now, if the only way the system exchanges energy with its surroundings is through heat transfer, the heat rate can be used to calculate the energy balance, since
Can you know the heat flux of a surface?
In real-world applications one cannot know the exact heat flux at every point on the surface, but approximation schemes can be used to calculate the integral, for example Monte Carlo integration .
vapemac Veteran
Maybe ask this guy? I heard he knows his stuff when it comes to flux capacitors
jjde Postman
Now, my usually MTL setup is 1.2 ohms, 2.5mm rod, 6 wraps on 28g Kanthal build. Vape that at 12w, 178 mW/mm2 & it's a cool vape, about what I like
jjde Postman
Second part I'm not so clear So is it as simple as more wattage = more heat, even with the same Heat Flux on both tanks?
Over 2 years cigarette free
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Bench Test Results: Vapcell Red S30 - 25A 3000mAh 18650...best performing 3000mAh right now
Test Report Summary: The ratings for this cell are exaggerated a bit, typical for Vapcell, but it performed very well. It beat both the Murata VTC6 and Samsung 30Q by a little and even performed about the same as the Murata VTC5A/VTC5D and Molicel P26A. This Vapcell ran at a slightly higher temperature though than the VTC’s and Molicel.
