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Td Tu

nu ku Tu = –ks-------------------

ds

where u and d subscript refer respectively to the upside and the downside of the pair.

B O U N D A R Y S E L E C T I O N

The selection list in this section shows the boundaries for the selected pairs.

P A I R S E L E C T I O N

When Pair Thin Thermally Resistive Layer is selected from the Pairs menu, choose the pair to define. An identity pair has to be created first. Ctrl-click to deselect.

P A I R T H I N T H E R M A L L Y R E S I S T I V E L A Y E R

Enter a value or expression for the Layer thickness ds (SI unit: m).

The default is to use the Thermal conductivity ks (SI unit: W/(m·K)) From material. Select User defined to enter another value or expression.

Thin Thermally Resistive Layer

Use the Thin Thermally Resistive Layer node to define the thickness and thermal conductivity of a resistive material located on boundaries.

The heat flux across the Thin Thermally Resistive Layer is defined by

Tu Td

nd kd Td = –ks-------------------

ds

Td Tu

nu ku Tu = –ks-------------------

ds

where u and d subscript refer respectively to the upside and the downside of the slit.

B O U N D A R Y S E L E C T I O N

From the Selection list, choose the boundaries to add a thermally resistive layer.

T H I N T H E R M A L L Y R E S I S T I V E L A Y E R

Enter a value or expression for the Layer thickness ds (SI unit: m).

The default is to use the Thermal conductivity ks (SI unit: W/(m·K)) From material. Select User defined to enter another value or expression.

426 | C H A P T E R 1 3 : H E A T T R A N S F E R B R A N C H

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