We carry out numerical simulations to optimize the re-udentry capsule configurations based on aero-thermodynamicudproperties such as drag, pressure and heat load. The openudsource software OpenFOAM is used with the compress-udible computational fluid dynamics (CFD) solver rhoCen-udtralFoam. CFD solver is implemented with the first-orderudMaxwell’s velocity slip and the Smoluchowski temperatureudjump boundary conditions. We report results for differentudaltitudes and Mach numbers with varying second cone an-udgle and bluntness of the re-entry capsule. It is noted that theudheat loads are greatly reduced by changing the capsule con-udfiguration from single to bi-cone. With increasing secondudcone angle heat loads are enhanced, but the average dragudand pressure coefficients found to be least sensitive. How-udever, with increase in bluntness the average value of heatudload decrease slightly and the peak value significantly, whileuddrag values exhibit contrasting behaviour.
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