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Volume 8, Number 3, 2018, Pages 675-689                                                                DOI:10.11948/2018.675
A regularized stiffened-gas equation of state
Jean-Michel Ghidaglia,Ahmed Amine Mrabet
Keywords:Stiffened-gas, equation of state, computational fluid dynamics, slightly compressible fluid
Abstract:
      An alternative to the stiffened-gas equation of state is proposed that corrects for unphysical behavior, namely the returning of negative pressure values for densities lower than the reference density. The question of generalizing a given isentropic equation of state is first addressed. Then, a regularized stiffened-gas equation of state is derived, which is the main goal of this work. Finally, the use of the new equation of state is briefly illustrated for a classical computational fluid dynamics benchmark concerning the evaluation of liquid impact on a wall.
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