Technical specification of the CFD code

The CFD in VENTO AEC code

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• Cell-centered Ghost-Cell Finite Volume formulation on Cartesian grids

• Non-Conformal Grid technique

• Coupled system of 5 pdes : continuity, momentum and total energy RANS equations

• Turbulence models: 1-eq Spalart Allmaras and 2-eq Kappa-Epsilon

• Solution algorithm: fully implicit with iterative red-black relaxation and Weiss preconditioning

• Dual Time Stepping technique with second order time accuracy

• Second order accurate schemes: Yee symmetric TVD and Roe upwind

• Adiabatic and thermal wall boundary conditions

 

Additional features:

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• Constant and time varying source terms for momentum and energy equations

• Steady state and transient Multispecies with constant and time varying source terms

• Passive scalar (steady state and transient)

• Wind Driven Rain

• Transient Air Exchange

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References:

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-M. Mulas et al: Efficient parallel computation of flows with arbitrary fluids for all regimes of Reynolds, Mach and Grashof numbers, International J. of Numerical Methods for Heat and Fluid Flows, Vol.12, no.6, 2002

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-J.M. Weiss and W.A. Smith: Preconditioning Applied to Variable and Constant Density Flows, AIAA J. Vol.33, no.11, 1995

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-H.C. Yee: Construction of Explicit and Implicit Symmetric TVD Schemes and Their Applications, Journal of Computational Physics, Vol.68 January 1987

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-P.L. Roe: Approximate Riemann Solvers , Parameters Vectors and Difference Schemes, Journal of Computational Physics, Vol.43, 1981

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-M. Mulas: The Non-Conformal Grid Technique, Vento CFD White Paper,