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48) Click "Solution Method for Built-in Matrix >>" option. (See fig 3.6)

Fig - 3.6: Dialog box for Matrix Solver

1. We will have matrix sweeps only in X and Y directions, so check the Matrix Sweeps in Directions: labeled checkbox and uncheck Z.
2. Check the checkbox for U, V, P and enter 5, 5, 10 as Number of Sweeps respectively. Leave Alternating Direction Implicit (ADI) method selected, as shown in Fig 3.6
3. Click "Apply".
4. Now Click "Close" to close the Advanced Output Control Option window.

49) Manually add the following command in the commands file:

"INTEgration for profile by HYBRid profile"

50) GoTo "Output Options" and click on "Advanced". Choose "Output File Options" and choose 80 column under format options. Select the variables U , V , P and MU as shown in Fig 3.7

Fig - 3.7: Screen for OUTPUT FILE OPTIONS

51) Click "Next >" to go to Runtime Control dialog window. (see Fig 3.8)

Fig - 3.8: Runtime Control dialog window

52) Click "Solve >>" and dialog box appears see fig 3.9.

Fig - 3.9: Steady State dialog box

Specify the values as follows

1. Select Customize "SOLVE" Command Options.
2. Specify Maximum and minimum number of steps as 200 both, for fixed number of steps.
3. Click "Apply".

53) Click "Finish" and a message window appears as shown in fig 4.0. Click "Yes" to save the project.

Fig 4.0 Answer Message window

This concludes the setup of the problem. If it is not already, make the Commands File viewable. It should look like:

/==== PROBLEM IDENTIFICATION ====/ TITLe FlowPastCylinder USER TutorialUser /==== GEOMETRY SPECIFICATIONS ====/ GRID 122 by 81 COORdinates X Y BLOCk format 1 header line file = 'FlowPastCylinder.grd' LOCAte ID=REGION1 WINDOW 2 2 2 80 LOCATe ID=REGION2 WINDOW 26 28 71 73 /==== INITIAL & BOUNDARY CONDITIONS ====/ INLEt at X- boundary OUTLet at X+;1.0 WALL at Y- WALL at Y+ BLOCkage at ID=REGION2 SET U everywhere 10.0 FIX U at region ID=REGION1 FIX V at region ID=REGION1 FIX P at region ID=REGION1 SET V everywhere 0.0 SET P everywhere 0.0 SET K everywhere 1.5 SET L everywhere 0.14 /==== FLUID PROPERTIES & CONSTANTS ====/ DENSity of FIRSt phase =1.0 VISCosity of fluid FIRSt phase 1.526E-05 /==== NATURE OF FLOW ====/ TURBulent model HRe Ke /==== SOLUTION OPTIONS ====/ MATRix Sweep in Direction(s) X Y MATRix U sweep 5 times using method: ADI MATRix V sweep 5 times using method: ADI MATRix P sweep 10 times using method: ADI /==== OUTPUT CONTROL ====/ SAVE U V P MU 'FlowPastCylinder.sav' FORMatted DIAGnostic node at (20,41) frequency:(1) U RU V RV P MU CONV GLOBal mode to epsilon = 1.0E-9 OUTPUT XY NARRow format everywhere U V P MU /==== RUNTIME CONTROL ====/ SOLVe STEADy-state Nmax=200, Nmin = 200 END

Fig - 4.1: Command file.

54) Go to Menu option Run >> Run Project (fig 4.2)

Fig - 4.2: Run Menu

It will start a Runtime console window as shown in fig 4.3

Fig - 4.3: Runtime Console.

Please note that a Stop button is provided in case it is a long run and the solution tends to diverge. Taking a look at the solution graph, one can easily see the trend of the index with increasing steps.

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