b'Engineer Innovation | AutomotiveFigure 3: Von-Mises stress and out-of-plane deflection of detailed board with components modeledFigure 4: Local surface heat transfer coefficients on blade-type automotive 10A fuseeverywhere across the surface. Theexposed surfaces of the geometry. traditional approach to representThese values can be exported from convection within a finite element toolSimcenter Flotherm XT. However, they is to apply a heat transfer coefficient torelate the local heat flux to the local the surfaces of the finite elementtemperature difference between the model, with different heat transfersurface and the fluid temperature in coefficients being applied to differentthe cell adjacent to the surface. Using surfaces if desired. However, these arethem with some other reference global surface-averaged values that linktemperature, e.g. the ambient, will give the surface to some remotethe wrong surface heat loss. The temperature, typically the ambient,meshes between the CFD software and whereas in the CFD software the heatthe FEA software are also different, transfer varies locally over the surfacewhich would also make it hard to map and the temperature that drives theheat transfer coefficients from one tool surface-to-fluid heat transfer is the localto the other, given the high level of fluid temperature in the near-wall.variation in heat transfer coefficient over the surface shown in Figure 4, and Figure 4 shows the variation in the localobtain the same local surface heat flux heat transfer coefficient values on thein both tools.54'