Computational Fluid Dynymics with TransAT (expert CFD solution)

TransAT-for-fluidflow-problemsTransAT© by ASCOMP is a multi-physics, finite-volume code based on solving single and multi-fluid Navier-Stokes equations on structured multi-block meshes. The grid arrangement is collocated and can thus handle more easily Body-Fitted Coordinates (BFC) grids. The solver is pressure based (Projection Type), corrected using the Karki-Patankar technique for subsonic to supersonic compressible flows. High-order time marching and convection schemes can be employed; up to 3rd order Monotone and TVD-bounded schemes in space and 5thorder RK in time. An algebraic multigrid algorithm is employed for the pressure equation, involving relaxation, restriction and prolongation up to 6 levels, to achieve high rates of convergence and error estimation.

Multiphase flows can be tackled using

  • (i) interface tracking techniques (Level Set, VOF with interface reconstruction, and Phase Field),
  • (ii) N-phase, phase-averaged mixture with Algebraic Slip, and
  • (iii) Lagrangian particle tracking (one-to-four way coupling).

Re-distancing of level set is ensured via 3rd order WENO scheme in Cartesian meshes and via fast marching BFC grids. Mass conservation is enforced using global and local mass and volume conserving schemes.

TransAT can be used to predict fluid flow and heat transfer in various industries, oil & gas, nuclear safety engineering, microfluidics, mechanical and chemical engineering, renewable energy and water technology.

ASCOMP: Sylvain Reboux: ;
Eurobios: Joris Costes:;

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