Reciprocal flow burner
hello I need design a burner with reciprocal flow. For axample, the first 100 second the flow come in to left and the 100 seconds later the flow come in to right. The gas inlet change each 100 seconds....
View Articleheat transfer influids
Hello, I did an experiment in labaratory, and now try to model it in Comsol. I had an ice "dumbbell", filled with water in gaps (in comsol i use simmetry). Insulation was everywhere, except ice...
View Articlehow to simulate mixture model in contact with structural model?
hi I want to couple mixture model with structural. But in mixture model I can't define the loading or displacement induced by structural model. can anyone help me? regards
View ArticleDifine Herschel-bulkley parameters
Hi I'm trying to understand how can i define shear stress parameters for Herschel-bulkley model in Comsol 4.2a The stress expression for this model is: stress = yield stress+m*(shear rate)^n Any...
View Articlerotating machinery
Hi I'm trying to simulate a stirring tank, but my model doesn't converge. The parameters are exactly the same as another model with a different, simpler impeller. I just don't know where to begin. Does...
View ArticleFluid structure interaction module discussion 2
Hi, Dear all, I guess my previous request too complicated. So i start from a single one to demonstrate fluid structure interaction module, just two single rectangular. surprisingly it still cannot...
View ArticleAutoclave with two sets of impeller blades to hollow rotating shaft - Error...
hi I developed a simple autoclave (which has two sets of impeller blades to hollow rotating shaft placed at different positions )in 3D, rotational machinery laminar flow as my physics and time...
View Articleproblems with non-isothermal three phase flow in the porous media
I have built a non-isothermal three phase flow in the formation: low temperature CO2 injection into the formation to displace oil. Set the phase saturation, pressure and temperature as the primary...
View ArticleFlow through a rotating objects
Hi everyone. I wanna build a model based on the fluid dynamics. I want to know the fluid shape when the water through one rotational disk, which has four holes. Could you just give me a little clue?
View ArticleMHD simulation problem
hi, i got a problem about MHD (magneto-hydraulic) simulation.The fluid is driven by a high frequency magnetic field and free deformation occurs hopefully. The fluid deformation occurred at a relative...
View Articlethe task of melting
HI! There are two cylinders are connected by a tube, in the upper cylinder rod equipped with a high temperature which melts due to the contents of the cylinder and flows down through the tube to the...
View ArticleRaylegh-Benard Convection in a porous media
Hi everyone, I'm studying Raylegh-Benard convection in a porous media in a very simple domain: an impermeable box heated from below. I experienced some problems trying to simulate steady convection, I...
View Articlewhats the difference and relationship of boundary system and global...
In moving mesh(ale), i have to set the mesh velocity ,but im confused about whats the difference and relationship of boundary system and global coordinate system .
View Articlethe task of melting
HI! There are two cylinders are connected by a tube, in the upper cylinder rod equipped with a high temperature which melts due to the contents of the cylinder and flows down through the tube to the...
View ArticleStabilization of the Navier-Stokes
Hello, I've another question about the streamline stabilization of the Navier-Stokes equations. Comsol's documentation says that it uses G. Hauke and T.J.R. Hughes, “A Unified Approach to Compressible...
View ArticleUndefined value found in the equation residual vector.
I am trying to model a pem fuel cell. Although I have entered all parameters and values, i have some errors as follows; Undefined value found. - Detail: Undefined value found in the equation residual...
View ArticleCollision and agglomeration of two particles
Hi all! How I can simulate collision and agglomeration of two particles in particle tracing module? It's can found in process of spheroidisation in rf plasma torch..
View ArticleParticle impact angle and erosion rate in 90 degree pipe elbow
Hi, I've modelled a 90 degree pipe elbow carrying oil with a k-omega turbulent model. I've computed the turbulent flow study and then ran a particle tracing module afterwards. I'm currently trying to...
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 Articlehow to use chemkin thermo and transport properties in fluid flow and heat...
Hi , there, I am simulating laminar flow premixed hydrogen combustion in a combustor with hydrogen, oxygen and steam mixture. So I choose (1)reaction Engineering (2)laminar flow and (3)heat transfer...
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