Convective Heat Transfer
Convective heat transfer.
blockType: AcausalFoundation.Thermal.Elements.Convection
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Convective Heat Transfer Path in the library: |
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Controlled Convective Heat Transfer Path in the library: |
Description
Block Convective Heat Transfer It is the transfer of heat by convection between two bodies, that is, heat transfer through the movement of matter. The process is described by the Newton-Richman law:
Where:
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— heat flow.
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— coefficient of convective heat transfer.
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— surface area.
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and — temperatures of two bodies .
A and B are thermal ports corresponding to different bodies. Since the positive direction of the block is from port A to port B, the heat flow is positive if it flows from A to B.
Ports
Input
K — heat transfer coefficient control signal, W/(K*m2)
scalar
The input signal for controlling the heat transfer coefficient. The signal is saturated when the value exceeds the minimum limit set by the Minimum heat transfer coefficient parameter.
Dependencies
To use this port, check the box for the Controlled heat transfer coefficient parameter.
Parameters
Controlled heat transfer coefficient — visibility of the input port for setting the heat transfer coefficient
disabled (by default) | enabled
Check the box to enable the input port K.
The input control signal on port K sets the heat transfer coefficient, which can change during simulation.
The Minimum heat transfer coefficient parameter sets the lower limit of the heat transfer coefficient.
Area — heat exchange area
1e-4 m2 (by default) | positive scalar
Heat exchange surface area.
Heat transfer coefficient — coefficient of heat transfer by convection
20.0 W/K*m2 (by default) | positive scalar
Coefficient of heat transfer by convection.
Dependencies
To use this option, uncheck Controlled heat transfer coefficient.
Minimum heat transfer coefficient — lower limit of the heat transfer coefficient
0.001 W/K*m2 (by default) | positive scalar
The lower limit of the coefficient of convective heat transfer.
The input signal on port K is saturated at this value to prevent further reduction of the heat transfer coefficient.
Dependencies
To use this option, select the Controlled heat transfer coefficient checkbox.
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.