Modelagem computacional de escoamentos reativos compressíveis

Abstract

The need to accurately simulate a wide range of physical phenomena in engineering dri- ves the development of Computational Fluid Dynamics (CFD) codes capable of handling different compressibility regimes. In applications such as turbomachinery and industrial burners, low-velocity regions coexist with transonic flow areas, requiring algorithms capa- ble of handling all compressibility regimes. In addition, other physical phenomena such as chemical species transport, combustion, and turbulence are commonly encountered. This work presents the development, verification, and validation of a compressible PISO algorithm coupled with an immersed boundary method and adaptive mesh refinement, using the finite-volume method to solve the Navier-Stokes equations, energy balance, con- tinuity, and chemical species balance. The PISO coupling was modified to consider com- pressibility effects and implemented in MFSim, which already includes LES and URANS turbulence models, as well as turbulent combustion models such as EDC. The code va- lidation was performed through the simulation of several distinct cases, including shock tube, natural convection, flow in a channel with a bluff body, and supersonic flow over a step. The results demonstrate the ability of the code to handle different compressibility regimes, turbulence, and combustion, showing its potential for use in complex engineering problems.