Numerical Aero-Thermal Investigation for a Science Payload in a Dust Devil Boundary-Layer on Mars

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'The hardware for a Mars exploration mission shall be designed to operate during exposure to the Martian dust devil winds.

The current numerical investigation aims to predict the aerodynamic loads and the convective heat transfer coefficient on the surface of the geophysical instruments deployed on Mars. An additional issue is the stability analysis of the payload, according to the maximum ground slope detected. A detailed 3D model of the instruments has been realized, discretizing the fluid domain with a high-resolution volume grid of more than 3 million tetrahedral cells. The Martian flow field is properly simulated considering Mars atmospheric composition. Aero-thermal loads due to dust devil boundary-layer have been estimated according to a 4-region logarithmic law for the velocity profile and a day time thermal profile in survival mode. The analysis is performed by STAR-CCM+ 8.04.007, solving the set of steady RANS equations with the segregated flow approach and the realizable k-ε turbulence model.'

Author Company: 
Active Space Technologies GmbH
Author Name: 
Bianca Cefalo, Dario Severino