Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.
Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.
sliding wall boundary condition
Posted Jan 20, 2011, 6:44 a.m. EST Fluid & Heat, Geometry, Parameters, Variables, & Functions Version 3.5a 1 Reply
Please login with a confirmed email address before reporting spam
Hi, I'm new to COMSOL and I'm trying to teach myself the software by trying some simple examples so that I can build my own, more complicated model as part of a dissertation on Fluid dynamics (specifically, a problem on fluid film coating theory) at university.
I'm having some issues with using the sliding wall boundary condition. These are mostly down to the fact I don't know what it does. For example, I've made a simple 2D geometry consisting of a rectangle (short and fat) with slip conditions on the bottom and right hand walls, a free surface on the top and a sliding wall with no-slip on the left edge. I'm using the Moving Mesh (ALE) transient analysis with Incompressible Navier-Stokes in the Multiphysics menu. Essentially, I've copied the Sloshing Tank example from the model gallery (www.comsol.com/showroom/gallery/435/).
So, my question is: what does the sliding wall do? Does it stay where it is and work as a kind of conveyor belt, or does it move from where it is with the velocity you define?
I'm having some issues with using the sliding wall boundary condition. These are mostly down to the fact I don't know what it does. For example, I've made a simple 2D geometry consisting of a rectangle (short and fat) with slip conditions on the bottom and right hand walls, a free surface on the top and a sliding wall with no-slip on the left edge. I'm using the Moving Mesh (ALE) transient analysis with Incompressible Navier-Stokes in the Multiphysics menu. Essentially, I've copied the Sloshing Tank example from the model gallery (www.comsol.com/showroom/gallery/435/).
So, my question is: what does the sliding wall do? Does it stay where it is and work as a kind of conveyor belt, or does it move from where it is with the velocity you define?
1 Reply Last Post Jan 20, 2011, 9:10 a.m. EST
Please login with a confirmed email address before reporting spam
Posted:
1 decade ago
Hi
if you index your doc files and search for "sliding wall" you will among others find in:
v3.5a p44 of chemug.pdf
- When a wall moves with a prescribed tangential velocity, use the Sliding wall condition.
--
Good luck
Ivar
if you index your doc files and search for "sliding wall" you will among others find in:
v3.5a p44 of chemug.pdf
- When a wall moves with a prescribed tangential velocity, use the Sliding wall condition.
--
Good luck
Ivar