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In the Select Physics tree, select Heat Transfer>Radiation>Heat Transfer with Surface-to-Surface Radiation.
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Click Add.
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Locate the Definition section. In the Expression text field, type Tavg[1/K]+dT[1/K]*cos(2*pi*(x-14)/24).
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Select the object cyl1 only.
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Select the objects arr1(1,1,1), arr1(1,2,1), arr1(2,1,1), arr1(2,2,1), arr1(3,1,1), arr1(3,2,1), blk2, and blk3 only.
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Select the object cone1 only.
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Select the object cone2 only.
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In the tree, select Built-in>Air.
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In the tree, select Built-in>Aluminum.
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Locate the Geometric Entity Selection section. From the Geometric entity level list, choose Boundary.
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Locate the Radiation Settings section. From the Wavelength dependence of radiative properties list, choose Solar and ambient.
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In the Model Builder window, under Component 1 (comp1)>Surface-to-Surface Radiation (rad) click Diffuse Surface 1.
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In the Date table, enter the following settings:
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In the Local time table, enter the following settings:
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Click
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Click Replace.
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In the Settings window for Surface, click Replace Expression in the upper-right corner of the Expression section. From the menu, choose Component 1 (comp1)>Surface-to-Surface Radiation>Irradiation>Source heat flux - W/m²>rad.q0su1 - Source heat flux, 1 component.
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