Dynamic mesh setup, VOF 2 Phase, moving zones, possible? (diagram / picture)

silent2608 · January 20, 2016, 09:19

Hi,

I'm new to dynamic meshing, I need to lower the computational cost of my problem. My idea was to use dynamic meshing to accomplish this, however since I have no experience with it I need basic guidance on whether or not this is even possible.

Water / oil is simulated in a capillary which is otherwise filled with air. I want to define various coarse / fine zones within the mesh. Part of it will be filled with the fluid. At first I will do a 1s simulation without gravity until the curvature is stable, then gravity will be activated and the mesh sorrounding the fluid has to move with the fluid.

I need to do this to get a high resolution fluid/gas interface, which will be necessary for follow up simulations (marangoni flow, heat transfer within that region etc.)

I understand interfaces between coarse and fine meshes need to be modeled because they are matching surfaces with different mesh topology. How do I manage to apply movement v(g)? Is the 6DOF solver appropriate? Any help regarding setup is very much appreciated, especially because the movement v(g) can't be defined as a value, since it will change throughout the simulation.

silent2608 · January 21, 2016, 06:58

So far I've tried sliding mesh, two adjacent zones have contact via interface.

Dynamic mesh is activated (layering etc. all deactivated) and one of the zones has been set to a fixed translational velocity in cell zone conditions. Interface options is set to periodic boundary condition.

I don't get any movement whatsoever even though it is specified and I get no errors.

January 20, 2016, 09:19	Dynamic mesh setup, VOF 2 Phase, moving zones, possible? (diagram / picture)	#1
silent2608 New Member Join Date: Nov 2015 Posts: 17 Rep Power: 10	Hi, I'm new to dynamic meshing, I need to lower the computational cost of my problem. My idea was to use dynamic meshing to accomplish this, however since I have no experience with it I need basic guidance on whether or not this is even possible. Water / oil is simulated in a capillary which is otherwise filled with air. I want to define various coarse / fine zones within the mesh. Part of it will be filled with the fluid. At first I will do a 1s simulation without gravity until the curvature is stable, then gravity will be activated and the mesh sorrounding the fluid has to move with the fluid. I need to do this to get a high resolution fluid/gas interface, which will be necessary for follow up simulations (marangoni flow, heat transfer within that region etc.) I understand interfaces between coarse and fine meshes need to be modeled because they are matching surfaces with different mesh topology. How do I manage to apply movement v(g)? Is the 6DOF solver appropriate? Any help regarding setup is very much appreciated, especially because the movement v(g) can't be defined as a value, since it will change throughout the simulation.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Is my Dynamic mesh setup correct?	cfd seeker	FLUENT	16	October 30, 2020 06:16
snappyhexmesh remove blockmesh geometry	philipp1	OpenFOAM Running, Solving & CFD	2	December 12, 2014 10:58
[ICEM] Hexa mesh, curve mesh setup, bunching law	Anorky	ANSYS Meshing & Geometry	4	November 12, 2014 00:27
Interesting problem: Parallel Processor VOF Fluent + Dynamic Mesh + System Coupling	spaceprop	FLUENT	5	September 2, 2014 09:43
Question on moving mesh, mesh velocity is really small!	ripperjack	Main CFD Forum	2	April 28, 2014 13:37

January 21, 2016, 06:58		#2
silent2608 New Member Join Date: Nov 2015 Posts: 17 Rep Power: 10	So far I've tried sliding mesh, two adjacent zones have contact via interface. Dynamic mesh is activated (layering etc. all deactivated) and one of the zones has been set to a fixed translational velocity in cell zone conditions. Interface options is set to periodic boundary condition. I don't get any movement whatsoever even though it is specified and I get no errors.