Controlled Convective Heat Transfer
Convective heat transfer.
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Description
The unit Convective Heat Transfer represents the transfer of heat by convection between two bodies, i.e. heat transfer through the motion of matter. The process is described by the Newton-Richmann law:
Where:
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- heat flux.
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- convective heat transfer coefficient.
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- surface area.
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and are the temperatures of the 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 flux is positive if it flows from A to B.
Ports
Input
K - heat transfer coefficient control signal, W/(K*m²)
scalar
Heat transfer coefficient control input signal. The signal saturates when the value goes beyond the minimum limit set by the Minimum heat transfer coefficient parameter.
Dependencies
To use this port, select the Controlled heat transfer coefficient checkbox.
Parameters
Controlled heat transfer coefficient - visibility of the input port for setting the heat transfer coefficient
off (by default) | on
Select the checkbox to enable the K input port.
The input control signal on the K port sets the heat transfer coefficient, which can be changed during the simulation.
The Minimum heat transfer coefficient parameter sets the lower limit of the heat transfer coefficient.
Area is the heat transfer area
1e-4 m² (by default) | `positive scalar'.
Heat transfer surface area.
Heat transfer coefficient - heat transfer coefficient by convection
20.0 W/K*m² (by default) | `positive scalar'.
Heat transfer coefficient by convection.
Dependencies
To use this parameter, uncheck the Controlled heat transfer coefficient box.
The Minimum heat transfer coefficient is the lower limit of the heat transfer coefficient
0.001 W/K*m² (by default) | `positive scalar'.
Lower limit of convective heat transfer coefficient.
The input signal on the K port saturates at this value to prevent further reduction of the heat transfer coefficient.
Dependencies
To use this parameter, select the Controlled heat transfer coefficient checkbox.
Initial value of temperature difference - initial value of temperature difference
0.0 K (by default).
Initial value of temperature difference.
Initial value of heat flow rate - initial value of heat flow rate
0.0 W/(K*m²) (by default).
Initial value of heat flow rate.