The paper presents an improved approach for modelling multi-component gas mixtures based on quasi-gasdynamic equations. The proposed numerical algorithm is implemented as a reactingQGDFoam solver based on the open-source OpenFOAM platform. This solver has been extensively validated and verified through a variety of well-described test problems. The stability and convergence parameters of the proposed numerical algorithm are determined. The simulation results are found to be in agreement with analytical solutions and experimental data.

Response surface method-based hydraulic performance optimization of a single-stage centrifugal pump.

This paper highlights the impact and importance of including turbulence effects on topology optimization of compressible flow. The study proposes a novel approach based on Favre-Averaged Navier–Stokes equations and the compressible version of the Spalart–Allmaras model and solves first the compressible turbulent adjoint model by coupling dolphin adjoint from FEniCS and OpenFOAM software. Examples demonstrate the effects of turbulence on compressible flow and analyze industrial cases such as pipes, diffusers and mixers chambers where non-intuitive and efficient designs are presented.

The study proposed a new correction of non-equilibrium terms for the $$$ k-\omega $$$ turbulence model. The suggested method of correcting the non-equilibrium effect can be useful in the future to formulate high-speed models based on all turbulent mechanisms.

We introduce semi-implicit Lagrangian Voronoi approximation (SILVA), a novel numerical method for the solution of the incompressible Euler and Navier–Stokes equations, which combines semi-implicit time marching with time-dependent Voronoi tessellations with topology changes. In SILVA, the numerical solution is stored at particles, which move with the fluid velocity and play the role of the generators of the computational mesh. The velocity field is projected onto a divergence-free manifold. We validate SILVA by illustrative benchmarks, including viscous, inviscid, and multiphase flows.