Development of a parallelised fluid solver for problems with mesh interfaces and deforming domains

AGUERRE, HORACIO J.; MÁRQUEZ DAMIÁN, SANTIAGO; GIMENEZ, JUAN M.; NIGRO, NORBERTO M.

COMPUTERS & FLUIDS

PERGAMON-ELSEVIER SCIENCE LTD

Año: 2018 vol. 168 p. 110 - 129

0045-7930

Numerical simulation of piston-cylinder problems such as internal combustion engines suffers from two difficulties related todiscretization: the non-matching interfaces between cylinder and ports and the large deformation of the cylinder region. In this con-text, this paper presents a parallelized computational strategy, based on the Finite Volume method, where the mentioned issues areovercome. The non-matching discretization between regions is addressed with a new methodology which integrates the ArbitraryCoupled Mesh Interface (ACMI) method with the pseudo-supermesh approach to couple conservatively mesh interfaces with partialoverlapping. For the large cylinder deformations, a layer addition/removal strategy is enhanced with mesh deformation to improvethe handling of the mesh resolution . All methodologies are integrated and implemented for parallel computing obtaining a goodscalability and computational efficiency. Specific examples are solved to analyse the performance of the new interface method andlayering working separately and finally, the combination of both strategies is tested solving an internal combustion engine problemwhere the robustness of this dynamic mesh proposal is evaluated.