PROBLEM DEFINITION

This problem examines the flow of a silicon nanoparticle carrier gas within a chamber that contains a silicon wafer. The top walls are heated, and the wafer is kept at a cold temperature. As the particles flow over the wafer, they are deposited on it because of thermophoresis. The geometry is shown below:

EXECUTABLE AND INPUT FILE

Input file (PROB.INP)

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

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

SAMPLE RESULTS

Simulations

(Note: results are rotated -90 degrees with respect to above figure)

Computational Grid (generated using CONTOUR):

Velocity vector field – vectors < 0.025 m s-1 are shown only (generated using ARROW):

Streamlines (generated using ARROW):

V-Velocity field contours (generated using CONTOUR):

Temperature field contours (generated using CONTOUR):

Sample results input file (PROB.INP)

*

* ===[ PARAMETER FILE FOR SILICON NANOPARTICLE CHAMBER UNITS IN SI ]======

*

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

Length of inlet, chamb1, chamb2, chamb3, plate [AL1-AL4,ALG]

1e-2, 2.8448e-2, 2.8448e-2, 2.8448e-2, 1e-2

Radius of inlet, chamb1, chamb2, chamb3, outlet, plate [RL1-RL4,RLO,RLP]

1.0e-2, 5.08e-2, 12.7e-2, 5.08e-2, 2.032e-2, 10.16e-2

Temperature of inlet, chamb1, chamb2 wall and plate [TIN,TCH1,TCH2,TPLATE]

273, 373, 373, 273

Inlet Velocity [UIN]

0.05

Parabolic inlet velocity profile (.TRUE.=yes, .FALSE.=no) [UPARAB]

.TRUE.

===[ GRID AND GEOMETRY VARIABLES ]=======================================

Number of cells in X, Y direction  [NI, NJ]

40, 40

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

Solve for U, PP, T equations ?  [INCALU, INCALP, INCALT]

.T., .T., .T.

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

Material Density, Laminar fluid viscosity  [DENSIT, VISCOS]

1.0, 1e-5

Laminar Prandtl number  [PRANDT]

0.7

===[ ITERATION PARAMETERS ]=============================================

Maximum number of iterations per time step  [MAXIT]

500

Maximum acceptable value of residuals  [SORMAX]

0.005

Under-relaxation factors for U,P,T equations  [URFU,URFP,URFT]

0.4, 0.1, 1.0

===[ EQUATION SOLVER PARAMETERS ]======================================

Solver selection for U, PP, T equations  [ISLVU, ISLVP, ISLVT]

1, 1, 1

Number of iterations for PP-equation per cycle [LITERP]

7

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

I,J index of monitoring location  [IMON, JMON]

25, 25

Iteration Index for field printout  [NITPRI]

1000

.F.

Name of restart file  [RSTFIL]

RESTAR2.BIN

Copy OUT FINAL field  [INWRIT]

.TRUE.

Name of SAVE file  [SAVFIL]

RESTAR2.BIN

Name of RESULTS file  [OUTFIL]

CHAMBER.OUT