Dynamic Mesh Motion in Ansys Fluent - Part 3
Hello everyone, this is Mohsen Seraj from the Ozen Engineering team. This is the third part of the video series where I work with dynamic mesh motion. In parts 1 and 2, I discussed how to set up the model for dynamic mesh motion in Ansys Fluent.
Defining Mesh Motion
In this part, we will focus on how to define mesh motion in the following scenarios:
- Purely horizontal motion
- Purely vertical motion
- A combination of X and Y components
We usually receive this information from measurements or, if we have Fluid-Structure Interaction (FSI), from Ansys Mechanical. In this example, we are using sinusoidal motion.
Vertical Mesh Motion
For vertical motion, we use a sinusoidal wave profile:
- The mesh moves up and then down, returning to the original position.
- This completes one cycle, which is then repeated.
Horizontal Mesh Motion
For horizontal motion, the mesh behaves as follows:
- Moves to the right and then back to the left.
This is an example of dynamic mesh motion using a predefined profile for the X component, showing the position of the nodes over time.
General Planar Motion
When dealing with general planar motion:
- The mesh moves both upward and to the right.
- Then, it returns to the left and downward.
This type of motion is a combination of horizontal and vertical components.
Conclusion
In this video, I demonstrated how to use dynamic mesh motion for:
- Vertical motion going up and down.
- Horizontal motion moving left or right.
- A combination of both motions, replicating vibrations from measurements.
I also showed the profile used for this demonstration. In parts 1 and 2, I explained how to create this model in Ansys Fluent and Ansys Meshing.
Thank you for watching!
Hello everyone, this is Mohsen Seraj from the Ozen Engineering team. This is the third part of the video where I work with dynamic mesh motion. In parts 1 and 2, I already talked about how to set up the model for dynamic mesh motion for a model in Ansys Fluent.
So, in this part, we want to show you just how to define the mesh motion if it is only purely horizontal or purely vertical, or it's a combination of the X and Y components.
And usually, we receive this information from measurements or if we have FSI, which is fluid-structure interaction, it is from Ansys Mechanical. So, whatever way that you prepare the motion, or if it is, for example, in this example, we are using only sinusoidal motion, please watch this video.
About the mesh motion, we use a profile. Basically, we have vertical motion that is like a sinusoidal wave going up and down. At first, as you see, up to here, the mesh should go up, and then from here up to here, the mesh should go down, and then back to the original position.
So, it is just one cycle. Then we are going to have the next cycle, then again going up, going down, and then back to the original position. And if it is horizontal motion for the mesh, then the mesh will go to the right up to here, and then move back to the left up to here.
For example, dynamic mesh motion, this is the topic for dynamic mesh motion. We have a profile for dynamic mesh motion. This is for the profile, and it is for vertical motion, so in the Y direction. This is for smoothing and remeshing together. We start to preview the mesh motion.
Thank you for watching! Transcription by ESO. Translation by — Okay, let's check horizontal motion. We already read the profile that we have the time and X position.
This is the profile that we have, first time, and then the next section, it is for the X component, so it shows that the position of the nodes. And be sure to mention that we should have the same data points for the time and for the positions.
Let's start pre-reading the mesh, say that for 25 to 10, and you can see the iterations for each time step that you are seeing that here, and the maximum minimum change in the value you can see here, that the moving nodes, because this world is stationary or deforming, but for this one, you can see that it's just moving to the right.
You can see that, and we see that the mesh here is deforming. Thank you for watching! Next step is if we have the general planar motion when we have the profile for the mesh. Please be sure to correct any misspelled Ansys product names as you transcribe, e.g., 'OptiSling' should be 'optiSLang'.
Let's see what's happening to the mesh motion. Let's start with 10 time seconds. As you can see, the mesh is going up and also to the right, 10 time steps, let's go for a larger time step. Now this is general planar mesh motion.
You can see that we are still going to the right and moving upward, go to pro, move upwards and forward. Transcription by ESO. Translation by — We are still going up and to the right, and now we started coming back to the left and down.
You can see it from here if you check the mesh grids with here. You can see that it is easier. Thank you for watching! Email id is inca.
So, in this video, I showed you how to use dynamic mesh motion for having the moving mesh, when you want to have only vertical motion going up and down, or if you want to have the horizontal motion purely only to the left or right, so this is a replication of the vibration, for example, that we can receive from the measurements when we have the data, or the third motion that is a combination of horizontal and vertical motions, and also showed you the profile that I use for this video.
In parts 1 and 2 of the series of this video that I already published, I showed you how to create this model in Ansys Fluent and Ansys Meshing. Thank you for watching this video.
