1) Click on Shell under the 2D Properties section.
2) Input Fin as the Property Set Name and then click on Input Properties .
3) Click on Select Material and select copper. Enter 0.001 as the Thickness. Click OK.
4) Click on Select Application Region and then click on the Select Members box. Screen pick the surface. Click Add, OK then Apply.
1) Select the Load/BCs tab. Under the Element Uniform section, select Convection.
2) Input Top Conv as the New Set Name, set the Target Element Type to 2D, and then click on Input Data.
3) Set Surface Option to Top. Input 25 for Top Surf Convection Coef and 20 for Ambient Temperature. Click OK.
4)Click on Select Application Region and then click on the Select Geometry Entries box. In the selection toolbar, select Surface or Face. Screen select the surface. Click Add, OK then Apply.
5) Repeat steps 2-4 using Bottom Conv as the New Set Name, and select Bottom for the Surface Option in the 3rd step.
1) Under the Meshing tab, click on Uniform Mesh Seeds.
2)Set the Number of Elements to 4. Click on the Curve List box and screen select the bottom curve. Click on Apply.
3) Click on Surface Meshers. Click on the Select Surface List box. Screen click the surface and input 0.005 as the Global Edge Length. Click Apply.
1) Using the governing equation below, we are able to create four elements on the surface.
2) Results: U1 = 100°C, U2 = 82.283°C, U3 = 70.732°C, U4 = 64.204°C, U5 = 62.053°C Nastran Results: U1 = 1.000000E+02°C, U2 = 8.448576E+01°C, U3 = 7.420589E+01°C, U4 = 6.832597E+01°C, U5 = 6.636874E+01°C (You can open the 'thermal_plate.f06' file with Notepad to view your results)
3) The small difference in these results is due to MD Nastrans non-linear analysis of the equation, making it more accurate.