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Jump relations across a shock in non-ideal gas flow

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Abstract

Generalized forms of jump relations are obtained for one dimensional shock waves propagating in a non-ideal gas which reduce to Rankine-Hugoniot conditions for shocks in idea gas when non-idealness parameter becomes zero. The equation of state for non-ideal gas is considered as given by Landau and Lifshitz. The jump relations for pressure, density, temperature, particle velocity, and change in entropy across the shock are derived in terms of upstream Mach number. Finally, the useful forms of the shock jump relations for weak and strong shocks, respectively, are obtained in terms of the non-idealness parameter. It is observed that the shock waves may arise in flow of real fluids where upstream Mach number is less than unity.

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Correspondence to R. K. Anand.

Appendix: Shock jump relations for ideal gas (Whitham 1958)

Appendix: Shock jump relations for ideal gas (Whitham 1958)

where M=U/a o and \(a_{o}^{2} = \gamma p_{o} / \rho_{o}\).

Jump relations for weak shocks in ideal gas (Anand 2000)

Jump relations for strong shocks in ideal gas (Yousaf 1987)

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Anand, R.K. Jump relations across a shock in non-ideal gas flow. Astrophys Space Sci 342, 377–388 (2012). https://doi.org/10.1007/s10509-012-1175-6

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