Numerical simulations have been carried out to explore the expansion ratio effects on the hypersonic rarefied flow past a forward-facing step using the Direct Simulation Monte Carlo (DSMC) method. An open source solver named dsmcFoam has been used for this purpose. The solver has been validated with well-established results from the literature and good agreement is found among them. Simulations have been carried out for expansion ratios (ER) of 2,4,6,8,10 in the transition regime. The different flow field properties have been studied. The profiles have found to be influenced by the compressibility and rarefaction effects. Limiting case of ER=8 and above has no influence on the flow field properties.


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    Title :

    DSMC simulation of rarefied gas flow over a forward-facing step: Effect of expansion ratio



    Conference:

    ADVANCED TRENDS IN MECHANICAL AND AEROSPACE ENGINEERING: ATMA-2019 ; 2019 ; Bangalore, India


    Published in:

    Publication date :

    2021-02-16


    Size :

    8 pages





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English