Getting Started with Simmodeler - Revision history

Moam3950 at 19:05, 14 May 2025

2025-05-14T19:05:19Z

2023-02-22T03:20:11Z

‎Boundary Layer Mesh Height Grows in X

2023-02-22T03:19:15Z

‎Boundary Layer Mesh Height Grows in X

2023-02-22T03:18:31Z

‎Boundary Layer Mesh Height Grows in X

2023-02-22T03:17:37Z

‎Boundary Layer Mesh Height Grows in X

2023-02-22T03:17:19Z

‎Boundary Layer Mesh Height Grows in X

2023-02-22T03:17:00Z

‎Boundary Layer Mesh Height Grows in X

2023-02-22T03:15:31Z

‎Boundary Layer Mesh Height Grows in X

2023-02-22T03:09:34Z

‎Boundary Layer Mesh Height Grows in X

2023-02-22T03:09:19Z

‎Boundary Layer Mesh Height Grows in X

@@ Line 48: / Line 48: @@
 ==Applying Boundary and Initial Conditions==
 A nice description of each of the common BCs used in both the Compressible and Incompressible builds of PHASTA is provided [[SimModeler|here]]. The same video as the [https://fluid.colorado.edu/tutorials/tutorialVideos/RajDemo.mp4 volume meshing step] shows how to apply boundary conditions for an incompressible case starting at around 16:20. This linked [https://fluid.colorado.edu/tutorials/tutorialVideos/BC_tutorial.mp4 video] also shows how the BCs are applied for an incompressible case. Note that the case needs to be called ''geom'' as is done and explained in the tutorial video. Once you are done applying the BC's, it is very important that you save out the model <code>.smd</code> file with these applied boundary conditions.
 ==Saving Out the Mesh==

@@ Line 23: / Line 23: @@
 # Create a 2D Boundary Layer attribute on the edge where you expect the boundary layer to grow. Select the "Specific Thicknesses" type.
-# Select the set the face where you want the boundary layer mesh to propagate into (it should be connected to the selected edge).
+# Select and set the face where you want the boundary layer mesh to propagate into (it should be connected to the selected edge).
 # Edit "Layer Thicknesses" and select "Import" in the pop-up window.
 #* The imported file should have the thicknesses of each layer of the mesh, growing as a function of x. The example below shows the first and last few lines of such a setup. In this case, the first layer of the mesh is 5e-6 m tall at the beginning of the selected edge. In the geometry file of this example, the beginning of the selected edge starts at 0.25 meters. As you traverse in x, the thickness of the mesh is scaled by a factor of 20. This pattern can be easily extrapolated in an excel file to grow the mesh at a desired rate.

@@ Line 25: / Line 25: @@
 # Select the set the face where you want the boundary layer mesh to propagate into (it should be connected to the selected edge).
 # Edit "Layer Thicknesses" and select "Import" in the pop-up window.
-#* The imported file should have the thicknesses of each layer of the mesh, growing as a function of x. The example below shows the first and last few lines of such a setup. In this case, the first layer of the mesh is 5e-6 m tall at the beginning of the selected edge. In the geometry file of this example, the beginning of the selected edge starts at 0.25 meters. As you traverse in x, the thickness of the mesh is scaled by a factor of 20. This pattern can be easily extrapolated in an excel file;
+#* The imported file should have the thicknesses of each layer of the mesh, growing as a function of x. The example below shows the first and last few lines of such a setup. In this case, the first layer of the mesh is 5e-6 m tall at the beginning of the selected edge. In the geometry file of this example, the beginning of the selected edge starts at 0.25 meters. As you traverse in x, the thickness of the mesh is scaled by a factor of 20. This pattern can be easily extrapolated in an excel file to grow the mesh at a desired rate.
 (1)  5.00E-06*(1.0+($x-0.25)*20) <br>

@@ Line 25: / Line 25: @@
 # Select the set the face where you want the boundary layer mesh to propagate into (it should be connected to the selected edge).
 # Edit "Layer Thicknesses" and select "Import" in the pop-up window.
-#* The imported file should have the thicknesses of each layer of the mesh, growing as a function of x. The example below shows the first and last few lines of such a setup. In this case, the first layer of the mesh is 5e-6 m tall at the beginning of the selected edge. In the geometry file, the beginning of the selected edge starts at 0.25 meters. As you traverse in x, the thickness of the mesh is scaled by a factor of 20. This pattern can be easily extrapolated in an excel file;
+#* The imported file should have the thicknesses of each layer of the mesh, growing as a function of x. The example below shows the first and last few lines of such a setup. In this case, the first layer of the mesh is 5e-6 m tall at the beginning of the selected edge. In the geometry file of this example, the beginning of the selected edge starts at 0.25 meters. As you traverse in x, the thickness of the mesh is scaled by a factor of 20. This pattern can be easily extrapolated in an excel file;
 (1)  5.00E-06*(1.0+($x-0.25)*20) <br>

@@ Line 30: / Line 30: @@
 (2)  5.88E-06*(1.0+($x-0.25)*20) <br>
 (3)  6.92E-06*(1.0+($x-0.25)*20) <br>
-. <br>
+... <br>
 (49) 1.00E-04*(1.0+($x-0.25)*20) <br>
 (50) 1.00E-04*(1.0+($x-0.25)*20) <br>

@@ Line 20: / Line 20: @@
 ===Boundary Layer Mesh Height Grows in X===
-An advanced technique for boundary layer meshing utilizes the "Specific Thicknesses" option of the 2D Boundary Layer attribute in SimModeler.
+An advanced technique for boundary layer meshing utilizes the "Specific Thicknesses" option of the 2D Boundary Layer attribute in SimModeler. This option can prescribe the boundary layer mesh to grow as it develops along the surface, mimicking the behavior of the boundary layer itself.
 ===Mesh Size and Face Extrusions===