MR-CFD experts are ready for dynamic Mesh analysis, consulting, training, and CFD simulation.
In Most CFD project, we design geometry, create a static mesh for this geometry and simulate this in by fix mesh. But sometimes we want to move some boundary or we have deforming shape during times. We must use dynamic mesh method. For example in mots aerodynamic problem we use fix mesh for our simulation but you can imagine there are two airplanes that are getting closer and you want to know effect of fluid flow behavior around airplanes and determine interaction between them during the time. So the relative position them are changing during time and should be modeled using dynamic mesh method. By using this method, mesh size and shape will be changed. If we use re-meshing or layering method, number of element also will be changed. Dynamic mesh method is entirely different from moving and sliding mesh also moving reference frame. In moving mesh whole zone rotate or translate in some direction but in dynamic mesh method boundary start to translate or transform. We can apply a predefined velocity by UDF or profile for boundaries or velocity of an object can be predicted based on fluid flow and gravity force balance. If we want to know the velocity of object based on this balance we should use SIX DOF dynamic mesh method.
Mesh quality during change should be conserved.ANSYS fluent has three different methods for changing mesh, smoothing, re-meshing, and layering.
We are highly experienced in using dynamic mesh in various CFD project and in the following, you can see a summary of our project related to using this module:
- Six DOF dynamic mesh for modeling variation of location and angle of ship and boat in wavy sea situation
- Simulation of the tidal turbine using six DOF dynamic mesh method (calculating rotation speed)
- Releasing of food box form airplane using six DOF dynamic method
- Simulation of globe valve movement during the time
- Train movement in the tunnel by variable velocity function in a urban tunnel
- Simulation of flap movement of an airplane wing
- Falling boxes into the water tank
- Modeling the underwater vehicle in Submerged and non-submerged situation
- Solid fuel combustion and modeling solid height level during burning fuel
- Fluid solid interaction of blood flow and vessel
- FSI simulation blood flow pumping ina human heart
- Fluid solid interaction of airflow around building and finding final deflection and fluctuation (two way and one way FSI)
- Two and four-stroke internal combustion engine engine
Dynamic Mesh by Fluent
Whenever the problem model was such that the fluid zone required mesh moment changes over time, the Dynamic Mesh technique will be used. In fact, in problems where the specific region of fluid and its boundaries were displaced during the simulation, a moving mesh should be used to momentarily transform and move the cells in the mesh. The mesh Smoothing and Remeshing techniques, provide instant mesh deformation capability. Remeshing is used when the mesh is more sensitive to mesh changes, which can be used to manually specify ranges of maximum and minimum elements in the Maximum and Minimum Length Scale for mesh changes. In the Dynamic Mesh Zone section, areas or boundaries of the model that should be affected by the mesh change must be defined, such as by Deforming to change the boundaries in the area (fluid around a moving object or a boundary-changing object), Rigid Body to moving physical boundary and moving boundaries but not boundaries themselves, from Stationary to fixed body and finally from System Coupling to FSI solution.
MR-CFD experts are ready to fulfill every Computational Fluid Dynamic (CFD) needs. Our service includes both industrial and academic purposes considering a wide range of CFD problems. MR-CFD services in three main categories of Consultation, Training, and Simulation. MR-CFD company has gathered experts from various engineering fields to ensure the quality of CFD services. Your CFD project would be done in the shortest time, with the highest quality and appropriate cost.
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