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微机电糸统分析
Walls
On all other boundaries except the target, set no slip conditions. If you use them at the target, the .
You use a structured mesh and refine it in the regions where the fluid interface passes.
Before starting the calculations, you must reinitialize the level set function. Do so by solving only for the level set function with zero velocity. Then use the resulting solution as initial data.
To calculate the droplet’s mass use an integration coupling variable. To visualize the droplet in 3D, revolve the 2D axisymmetric solution to a 3D geometry.
References
Jyi-Tyan Yeh, “A VOF-FEM Coupled Inkjet Simulation,” Proc. ASME FEDSM’01, New Orleans,
Louisiana, 2001.
2. E. Olsson and G. Kreiss, “A Conservative Level Set Method for Two Phase Flow,
” J. Comput. Phys., vol. 210, pp. 225-246, 2005.
11
Modeling Using the Graphical User Interface
Model Navigator
12
Geometry Modeling
1 From the Draw menu select Specify Objects>Line
2 Select Closed polyline (solid) from the Style list.
3 In the r edit field, enter 0 1e-4 1e-4 -5 -5 1e-4 1e-4 2e-4 2e-4 0, and in the z edit field 0 0 2e-4 -4 6e-4 6e-4 -3 -3 -3
-3.
4 Click OK.
5 Click the Zoom Extents button on the Main toolbar.
6 Shift-click the Rectangle/Square button on the Draw toolbar. Enter 1e-4 in the Width edit field, 2e-4 in the Height edit field, and 0 in both
the r field and the z fields. Make sure Corner is selected in the Base list. Click OK.
7 Repeat the previous step three times to specify three more rectangles according to the following table:
13
OPTIONS AND SETTINGS
1 From the Options menu select Constants.
2 Enter the following constant settings:
3 Click OK.
4 From the Options menu select Expressions>Scalar Expressions.
5 Insert the following expressions:
6 Click OK.
14
Physics Settings
Subdomain Settings—Incompressible Navier Stokes
1 In the Model Tree, right-click Incompressible Navier-Stokes (mmglf) and select Subdomain Settings.
2 Se
Walls
On all other boundaries except the target, set no slip conditions. If you use them at the target, the .
You use a structured mesh and refine it in the regions where the fluid interface passes.
Before starting the calculations, you must reinitialize the level set function. Do so by solving only for the level set function with zero velocity. Then use the resulting solution as initial data.
To calculate the droplet’s mass use an integration coupling variable. To visualize the droplet in 3D, revolve the 2D axisymmetric solution to a 3D geometry.
References
Jyi-Tyan Yeh, “A VOF-FEM Coupled Inkjet Simulation,” Proc. ASME FEDSM’01, New Orleans,
Louisiana, 2001.
2. E. Olsson and G. Kreiss, “A Conservative Level Set Method for Two Phase Flow,
” J. Comput. Phys., vol. 210, pp. 225-246, 2005.
11
Modeling Using the Graphical User Interface
Model Navigator
12
Geometry Modeling
1 From the Draw menu select Specify Objects>Line
2 Select Closed polyline (solid) from the Style list.
3 In the r edit field, enter 0 1e-4 1e-4 -5 -5 1e-4 1e-4 2e-4 2e-4 0, and in the z edit field 0 0 2e-4 -4 6e-4 6e-4 -3 -3 -3
-3.
4 Click OK.
5 Click the Zoom Extents button on the Main toolbar.
6 Shift-click the Rectangle/Square button on the Draw toolbar. Enter 1e-4 in the Width edit field, 2e-4 in the Height edit field, and 0 in both
the r field and the z fields. Make sure Corner is selected in the Base list. Click OK.
7 Repeat the previous step three times to specify three more rectangles according to the following table:
13
OPTIONS AND SETTINGS
1 From the Options menu select Constants.
2 Enter the following constant settings:
3 Click OK.
4 From the Options menu select Expressions>Scalar Expressions.
5 Insert the following expressions:
6 Click OK.
14
Physics Settings
Subdomain Settings—Incompressible Navier Stokes
1 In the Model Tree, right-click Incompressible Navier-Stokes (mmglf) and select Subdomain Settings.
2 Se
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