VNAP2: a computer program for computation of two-dimensional, time-dependent, compressible, turbulent flow
VNAP2 is a computer program for calculating turbulent (as well as laminar and inviscid), steady, and unsteady flow. VNAP2 solves the two-dimensional, time-dependent, compressible Navier-Stokes equations. The turbulence is modeled with either an algebraic mixing-length model, a one-equation model, or the Jones-Launder two-equation model. The geometry may be a single- or a dual-flowing stream. The interior grid points are computed using the unsplit MacCormack scheme. Two options to speed up the calculations for high Reynolds number flows are included. The boundary grid points are computed using a reference-plane-characteristic scheme with the viscous terms treated as source functions. An explicit artificial viscosity is included for shock computations. The fluid is assumed to be a perfect gas. The flow boundaries may be arbitrary curved solid walls, inflow/outflow boundaries, or free-jet envelopes. Typical problems that can be solved concern nozzles, inlets, jet-powered afterbodies, airfoils, and free-jet expansions. The accuracy and efficiency of the program are shown by calculations of several inviscid and turbulent flows. The program and its use are described completely, and six sample cases and a code listing are included.
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 5507314
- Report Number(s):
- LA-8872; ON: DE82007360
- Country of Publication:
- United States
- Language:
- English
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COMPUTER CODES
V CODES
LAMINAR FLOW
MATHEMATICAL MODELS
STEADY FLOW
TURBULENT FLOW
UNSTEADY FLOW
CALCULATION METHODS
GAS FLOW
NAVIER-STOKES EQUATIONS
NUMERICAL SOLUTION
REYNOLDS NUMBER
TIME DEPENDENCE
DIFFERENTIAL EQUATIONS
EQUATIONS
FLUID FLOW
PARTIAL DIFFERENTIAL EQUATIONS
420400* - Engineering- Heat Transfer & Fluid Flow