APRIORY ESTIMATION OF FLOW BEHAVIOR IN THE AREA OF CENTERED RAREFACTION WAVE REFLECTED FROM INTERFACE
D. N. Bokov
VANT. Ser.: Mat. Mod. Fiz. Proc 2006. Вып.3. С. 3-17.
The paper presents calculations of the interaction of a rarefaction wave with a rigid wall and with a contact discontinuity. It considers problems, which have analytical solutions. Relative errors of the calculated solutions are provided. The accuracy of calculation of the rarefaction wave interaction with a contact discontinuity is of great importance because errors in the calculated flow parameters on the contact discontinuity become perturbations in the flow parameters of the transmitted and reflected waves and are transferred both upstream and downstream. The case where EOS parameters on the left and on the right sides of the discontinuity are identical is well studied and described in the literature. It is taken as a test. For the case of different parameters on the left and on the right sides of the discontinuity point we formulate criteria for changing the type of the reflected wave.
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