MODELING OF COMPRESSIBLE FLUID PROBLEMS WITH OPENFOAM USING DYNAMIC MESH TECHNOLOGY

AGUERRE HORACIO; MARQUEZ DAMIAN, SANTIAGO; GIMENEZ JUAN; NIGRO NORBERTO

Mendoza

Congreso; ENIEF 2013; 2013

AMCA

Computational simulation of phenomena that are present in internal combustion engines is asuitable design tool for energetic efficiency optimization. OpenFOAMcapabilities as computational codeneed to be extended to approach more complex problems that appear in the modelling of thermodynamicengine cycles. The present work reports the development and testing of a new application for Open-FOAM that enables the use of a compressible fluid solver with dynamic mesh technology. Both featuresare essential to model internal combustion engines. Therefore, the implementation in OpenFOAM suiteof a topological mesh adaptation technique known as layering is presented. The layering technique isadded to the diffusion based mesh movement among others, in the mesh dynamics capabilities of Open-FOAM. This approach is used in the compressible solver called rhoPimpleDyMFoamMC to solve fluidproblems where the energy transfer on moving domains is carried out. The new computational tool isused to solve several problems with different boundary conditions in a closed piston-cylinder system. Adetailed analysis of the accuracy and convergence of the pressure-velocity-energy coupling is achievedand the results are compared with theoretical change of state equations.