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HiFUN: High Resolution Flow Solver on Unstructured meshes
Sandi has developed one of the most high performance computing (HPC) friendly commercial Computational Fluid Dynamics (CFD) software HiFUN. It is capable of simulating air flow over flying configurations, automobiles as well as structures such as buildings, ships etc. The latest version of HiFUN software marks the culmination of more than 100 man-years of research and development efforts.
HiFUN is a robust, fast, accurate and efficient tool for aerodynamic design and analysis. Various configurations analysed by HiFUN range from transport aircraft, fighter aircraft, missiles, launch vehicles, space vehicles, ships, locomotives etc. HiFUN is also capable of analysing multi-body dynamics problems such as store separation analysis.
Unstructured Face based data allowing for arbitrary polyhedral volumes
The solver allows the use of four basic mesh elements, namely, hex, tet, prism and pyramid, in combination. The adaptive capability of the solver, allowing for hanging nodes, results in arbitrary polyhedral volumes.
Higher order spatial accuracy
Higher order spatial accuracy is achieved by using a linear reconstruction procedure based on either method of least squares or Green-Gauss procedure. Use of Venkatakrishnan limiter ensures monotonicity of the solution for high speed flows.
Numerical Flux Formula
The solver supports a number of numerical flux formulas with a provision for the user to include his favorite flux formula.
Viscous Discretization
A positive viscous discretization ensures robustness of the flow solver even on grids with highly skewed cells. This is indeed an unique feature of this solver.
Non conformal block interface algorithm
The flow solver is equipped with an efficient algorithm to handle non conformal grids at an interface between two grid blocks.
Moving wall boundary condition
It is possible to simulate translating and rotating walls in the flow solver.
Multiple rotating frames of reference algorithm
The flow solver is equipped with an efficient algorithm to handle multiple rotating frames of reference in a given problem.
Algorithm to simulate porous media
The flow solver is capable of simulating flows through porous media.
Turbulence Models
The solver supports Spalart-Allmaras and k- Omega turbulence models. The model equations are solved in a decoupled manner. A robust discretization used for the model equations ensure high levels of convergence even for the turbulence quantities.
Wall Function
For turbulent computations, standard equilibrium wall function gets automatically activated if grid resolution near the wall is not adequate to resolve viscous sub–layer.
Convergence Acceleration
A matrix-free implicit procedure ensures rapid convergence, both for steady and unsteady computations (in dual time mode).
Parallel
A unique four layered approach to data handling on each of the processors ensures there is no degeneration in the performance of the parallel code as compared to a serial code, while at the same time achieving a linear speed up even for large number of processors. The MPI is used for message passing across the processors.
Higher order time accuracy
Formal second order time accuracy is achieved both on stationary and moving grids using a dual time stepping procedure. On the moving grids the solver is GCL compliant.
For more details, please contact: sales@sandi.co.in, info@sandi.co.in.