Thermodynamical Effects and High Resolution Methods for Compressible Fluid Flows
For researchers in computational fluid dynamics, this work addresses the often-neglected role of thermodynamics in numerical methods for compressible flows.
The paper refines the GRP solver to integrate thermodynamical variation into high-resolution methods for compressible fluid flows, demonstrating numerically that thermodynamic effects are crucial for resolving strong waves.
One of the fundamental differences of compressible fluid flows from incompressible fluid flows is the involvement of thermodynamics. This difference should be manifested in the design of numerical methods and seems often be neglected in addition that the entropy inequality, as a conceptual derivative, is taken into account to reflect irreversible processes and verified for some first order schemes. In this paper, we refine the GRP solver to illustrate how the thermodynamical variation is integrated into the design of high resolution methods for compressible fluid flows and demonstrate numerically the importance of thermodynamic effect in the resolution of strong waves. As a by-product, we show that the GRP solver works for generic equations of state, and is independent of technical arguments.