Encyclopaedia Index

Flow Simulation. Step 2.

Using the results of step 1.

If you have just completed Step 1 of this tutorial, the Q1 file which you then created should exist as step1.q1 in the sub-directory \phoenics\d_pc\tuts\beginnrs\step1 .

If this does not exist, for whatever reason, use the model file, step1mod.q1, which was provided at installation time in that sub-directory. Then proceed as follows.

Starting Step 2.

PHOENICS allows the effects of walls to be supplied in two different ways, namely:

  1. by way of blocks having finite volume and
  2. by way of surfaces which have none.
We wil introduce:

Starting the tutorial

Setting a working directory
  1. Activate VR-Editor by the way, described in the previous step.
  2. Click on 'Options', then 'Change Working Directory'; check that your working directory is, as before, \phoenics\d_pc\tuts\beginnrs.
  3. Otherwise select another working directory.

Using the Q1 file of the previous step

You will now edit the Q1 file of Step 1 to fit the present requirements. Open it in the VR Editor. To do so:
  1. Click on 'File', 'Open existing case'. You will then see the message that 'This operation will wipe out your current settings!' in the 'Open existing case' window. Click on 'OK'.
  2. 'Open' window appears with your working ('beginnrs') directory in it.
  3. Open 'step1' folder and select the 'case1' Q1 file that you have created in the previous tutorial.

    You may as well use the 'model1' Q1 provided during installation.

In the domain

Introduce and edit the required objects

  1. Introduce the WALL-H object

  2. Introduce the WALL-L object

  3. Introduce the WALL-W object

  4. Introduce the WALL-E object

  5. Edit the INLET object

  6. Edit the OUTLET object

All the required objects are now in the domain and it is possible to close the Object Management window clicking X in the upper right-hand corner.

Inspect the 'default' grid

Click on the 'Mesh toggle' button. The default mesh (shown as blue and orange lines) will appear on the screen.

The remaining solution-control parameters

The defaults which have been set in 'Menu', 'Numerics' will suffice for the present purposes.

Running the Solver

To perform the simulation, click on 'Run', 'Solver'(Earth), and click on 'OK'; to confirm. The solver will be then activated. Upon termination of the calculation, the VR Editor window will be displayed again. Now you can launch the VR Viewer to inspect the results of the calculation.

Using the VR Viewer.

Click on 'Run', 'Post processor',then GUI Post processor (VR Viewer) . Click 'OK' on the file names dialog to accept the default files.

Saving the results.