Why the numerical stability of the two-fluid model is so sensitive to the value of the coefficient of normal restitution, and how can handle it?

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Ms. Latifi

Vitalii, thank you so much!

M. Lopez de Bertodano

You also need to consider the interfacial pressure difference and you need to do a characteristic analysis to make sure the combination is well-posed.

Thank you for your comment, but if we use compressible TFM, we still need to consider the interfacial pressure difference?

It's up to you, but the ill-posed condition is an incompressible problem.

and also convergence of the numerical model? So to prevent these problems, it is better to consider the interfacial pressure difference. Thanks.