PROBLEM DEFINITION

This problem examines the laminar 2D flow of a Newtonian fluid around a solid cube placed within a free stream. We are examining the flow at steady state. The geometry is illustrated below: EXECUTABLE AND INPUT FILE

Input file (PROB.INP)

Windows 3.x/9x/ME/2000/NT Executable (PCBOXF.EXE)

Obtain both files in a compressed package (PCBOXF.ZIP)

SAMPLE RESULTS

Simulations

Computational Grid (generated using CONTOUR): Streamlines – focus on region close to body (generated using ARROW): U-Velocity field contours – focus on region close to body (generated using CONTOUR): V-Velocity field contours – focus on region close to body (generated using CONTOUR): Pressure field contours – focus on region close to body (generated using CONTOUR): Sample results input file (PROB.INP)

*

* ===[ PARAMETER'S FILE FOR PROB ]======================================

*

===[ PROBLEM PARAMETRES ]===============================================

Start pos of box   [XL1,YL1]

0.5,4.5

Dimension of field [XL2,YL2]

10.0,10.0

Box dimension [BXD]

1.0

Number of cells in box (X- and Y- direction)  [NSTX,NSTY]

5,5

Fluid velocity and angle againt horizontal axis (degrees) [UIN,UANGLE]

0.5,0.0

===[ GRID PARAMETERS ]==================================================

Number of cells in X-direction  [NI]

48

Number of cells in Y-direction  [NJ]

48

Grid expansion factor in X-direction BEFORE and AFTER box [FEXPX1,FEXPX2]

0.7 1.075

Grid expansion factor in Y-direction BEFORE and AFTER box [FEXPY1,FEXPY2]

0.75 1.15

===[ TIME PARAMETERS ]==================================================

.TRUE.

Number of time steps  [NT]

1

Time step size  [DT]

1.0

===[ DEPENDENT VARIABLES ]==============================================

Solve for U-equation ?  [INCALU]

.TRUE.

Solve for V-equation ?  [INCALV]

.TRUE.

Solve for PP-equation ?  [INCALP]

.TRUE.

Solve for T-equation ?  [INCALT]

.FALSE.

===[ THERMO-PHYSICAL PROPERTIES ]=======================================

Material Density  [DENSIT]

1.0

Laminar fluid viscosity  [VISCOS]

1.85E-3

Laminar Prandtl number  [PRANDT]

1.0

Update thermo-physical properties ?  [INPRO]

.FALSE.

===[ TERMINATION CRITERIA FOR ITERATIONS ]==============================

Maximum number of iterations per time step  [MAXIT]

2500

Maximum acceptable value of residuals  [SORMAX]

2.5e-4

Normalization quantity for mass residual  [SNORM]

1.0

Normalization quantity for U-momentum residual  [SNORU]

1.0

Normalization quantity for V-momentum residual  [SNORV]

1.0

Normalization quantity for T-equation residual  [SNORT]

1.0

===[ UNDER-RELAXATION ]=================================================

Under-relaxation factor for U-equation  [URFU]

0.4

Under-relaxation factor for V-equation  [URFV]

0.4

Under-relaxation factor for PP-equation  [URFP]

0.1

Under-relaxation factor for T-equation  [URFT]

1.0

===[ EQUATION SOLVER SELECTION ]========================================

Solver selection for U-equation  [ISLVU]

2

Solver selection for V-equation  [ISLVV]

2

Solver selection for PP-equation  [ISLVP]

2

Solver selection for T-equation  [ISLVT]

1

Constant used by SIM solver  [ALPHA]

0.8

===[ TERMINATION CRITERIA FOR EQUATION SOLVER ]=========================

Number of application of line iteration for U-equation  [LITERU]

2

Number of application of line iteration for V-equation  [LITERV]

2

Number of application of line iteration for PP-equation  [LITERP]

4

Number of application of line iteration for T-equation  [LITERT]

1

Maximum allowable value of solver residual sums for U  [SORU]

1.0E-6

Maximum allowable value of solver residual sums for V  [SORV]

1.0E-6

Maximum allowable value of solver residual sums for PP  [SORP]

1.0E-6

Maximum allowable value of solver residual sums for T  [SORT]

1.0E-6

===[ INPUT-OUTPUT PARAMETERS ]==========================================

I-index of monitoring location  [IMON]

2

J-index of monitoring location  [JMON]

25

Iteration Index for field printout  [NITPRI]

500

Time Index for field printout  [NSTPRI]

1

.FALSE.

Name of restart file  [RSTFIL]

PHIDA.

Copy OUT FINAL field  [INWRIT]

.TRUE.

Name of SAVE file  [SAVFIL]

PHIDA.

Name of main output file  [OUTFIL]

RUN.OUT

Generate velocity field file ?  [INPLOT]

.TRUE.

Generate pressure field file ?  [INPRES]

.TRUE.

Generate temperature field file ?  [INTEMP]

.FALSE.