Instruction Manual

for the Computer Program


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Send mail!       InstructionManual.pdf © 12.06.2018   Klaus Bauerfeind   all rights reserved        


The basic version   -- computer program   NaSt2D --   is written in the programming language C and serves for two-dimensionally numerically simulation of viscous, unsteady, incompressible, laminar flows based on the Navier-Stokes equations. It solves the Navier-Stokes equations, discreted by finite difference method, in a   staggered rectangle grid   for given boundary conditions with the SOR-method   (successive over-relaxation).

The mathematical description of flows, the numerical computation of the Navier-Stokes equations, the application of the program NaSt2D for solution a number of flow processes up to free boundary value problems and energy transport, as well as extensions of the program for coverage of turbulence, for parallel processing, and for three-dimensionally computations have been detailed explained from   M. Griebel, Th. Dornseifer and T. Neunhoeffer in Numerical Simulation in Fluid Dynamics, a Practical Introduction. SIAM, 1998   [1].

The here presented instruction manual is focused to an extension of the basic version   -- the program   NaSt2D-2.0 --   for calculation of turbulent flows with the   low-Reynolds number model   and the   standard k-ε model. It contains also more application examples for the flow around and through bodies with complicated geometries. In the instruction manual are described as focuses: structure of program, selection and configuration of input data for computation the implemented problems, implementation of new problems into the program, as well as the data preparation for visualization of the computed results with the graphic programs   GNUPLOT and DISLIN.

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