Thermal Resistance
Constant thermal resistance in thermal systems.
blockType: AcausalFoundation.Thermal.Elements.Resistance
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Description
Thermal resistance is an abstract quantity that combines thermal conductivity, convection and thermal radiation. Block Thermal Resistance allows you to simulate heat transfer in a generalized form, regardless of whether it is carried out by thermal conductivity, convection, radiation or a combination thereof.
Heat transfer equation for the block Thermal Resistance:
Where:
-
— thermal resistance.
-
— heat flow.
-
— temperature difference between layers.
Thermal resistance is related to other heat transfer quantities as follows:
Where:
-
— the distance between the layers, that is, the thickness of the material.
-
— the cross-sectional area perpendicular to the direction of the heat flow.
-
— thermal conductivity of the material.
-
— coefficient of convective heat transfer.
-
— radiation coefficient.
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and — temperatures at ports A and B, respectively.
Ports
A — layer A
heat
Thermal port corresponding to layer A.
B — layer B
heat
Thermal port corresponding to layer B.
Parameters
Thermal resistance — the value of thermal resistance
1.0 K/W (by default)
The value of thermal resistance.
Initial value of temperature difference — initial value of temperature difference
0.0 K (by default)
The initial value of the temperature difference.
Initial value of heat flow rate — initial value of heat flow
0.0 W/(K*m2) (by default)
The initial value of the heat flow.