modeling MHD with COMSOL
Hi Aoki, I read your two papers about MHD with salty water flow. Can you hellp me? At first I want do modeling your MHD with COMSOL (4.3b) and later I will be able other modeling of MHD. I do all of...
View Articleparticle tracing plot
Hi I have some problem for particle tracing plot. In the particle tracing plot, I guess that the released particle has certain path according to the time. It means, the path of particle at 0.2sec, has...
View ArticleERROR: Complex number encountered in real expression(when calculate the DEP...
Hello everyone: I use Particle tracing module for fluid to calculate the DEP force exerted on the nano-sized particles. When calculate the DEP I encountered a problem as follows: Complex number...
View ArticleConvergence issues with level-set conservative form
Hello Everyone, I am trying level-set conservative form for droplet generation in flow focusing device. I have tried the following: (a) non-conservative form: it converges well but mass conservation is...
View ArticleMultiple-size particle tracing
Hello everyone I have a short question on the particle tracing module. Does anyone know that whether it is possible to simulat particles of different sizes in the same model. How to implement this...
View ArticleMesh Computation Error
After successfully creating a mesh for a 10x10x10 room and running through an hour+ calculation it keeps spitting out the error seen in the attached image. Now this is a very coarse mesh used in the...
View ArticleDrag Calculation for a 3D Model
How does one compute the drag and lift for a 3-dimensional model. For example in the "Obstacle in Fluid" model provided : www.comsol.com/model/3d-fluid-...bstacle-in-a-fluid-channel-987 . Some sources...
View ArticleTransient Simulation - Continue option
I have ran my transient simulation from 0 - 900 s with 1 s time step. Now I want to continue the simulation from 900 s - 960 s with 1 s time step. How to do this?
View ArticlePiston Cylinder Simulation
Hi, I am trying to simulate oil flow in a piston cylinder assembly. The flow is incompressible and so I am using the Incompressible Navierstokes ---> Transient analysis application made. However,...
View Articlemoving wall?
Hi everyone, I wish to know does the model's wall boundary moving (with time), anyone know how to check on this? For further description, In the model, i used moving mesh coupled with fluid flow...
View ArticleHow to find the length or surface area of the interface in level-set method...
Hi, I need to know the surface of the interface. I am using the level-set method to track the interface of two fluids and I need to know surface area of the interface at each time step. Is it possible...
View ArticleMirror 3D for just one domain
I am using a symmetric model of a heat sink with forced cooling. I want my final figure to be the solid body of the heat sink without the fluid field, however, when I mirror 3d it mirrors all domains....
View ArticleParticles Transmission probability
I have faced a problem in Particle Trajectories. As when I use, in wall1, freeze wall condition, the Particles of size 0.5mm pass through the muffler until they reach the blade then stop and they do...
View ArticleCFD -turbulent flow
Hi I would like to insret in a tank-pipe model a velocity function that starts from 30m/s goes to 60m/s 90m/s and so on until 300 m/s. I was trying with step fnction but I didnt manage it. I am new at...
View Articlerigid particle carried by a channel flow
Hi I have to simulate the displacement and rotation of a rigid prticule in a fluid flow and I am not a professional on comsol. So, is there anyone who could help me? or if you have any examples of this...
View ArticleLarge Eddy Simulation
hello I want to use Large Eddy Simulation on comsol but I can't found it. Can you help how to do this. thanks a lot
View ArticleAcoustic Band Structure of Metamaterials
Hi folks, I have been trying to find the band structure of an acoustic metamaterial. I have been attempting to adapt the "Bandgap analysis of Photonic Crystal" tutorial given for COMSOL 3.5a to 4.3. I...
View Articledifference between 'fpt.V' and 'fpt.vx'
Hi everyone: I use the fluid particle tracing module(fpt) to calculate the trace. I want to know the differences between the 'fpt.V'(particle belocity magnitude) and the fpt.vx,fpt.vy,fpt.vz(particle...
View Articlewrong density of material air in a tube
I'm trying to simulate a 2m long tube with a inside diameter of 10mm. With a constant gas inflow of 1,6 m/s. At 1m I heat the tube up to 200 degC on the inside tube wall. The heater should result in a...
View ArticleCFD Air fluid
hi . what is the standards for put some building in Air Tunnel but the result seems is not true . how can i reach to this picture . i did it once but i cant remember how did i do that . please help me...
View Article