Surface evaporation, condensation
Hi, I want to model surface evaporation from a water flow at 40 Celsius and observe the consequent condensation on a cold surface. Can you help me with the model that I should use? I could not find...
View Articlehow to enter a Channel thickness
Hi everybody, how to enter the Channel thickness? I use the (laminar flow -> mass flow -> mass flow rate -> normal mass flow rate), but get an error! I read a comsol documentation and I think...
View ArticleHow to set initial velocity in level-set method two phase flow for one phase
Hi guys, I am trying to set the initial velocity for a droplet as fluid 1, how can I set an initial velocity for the bulk of fluid (for example the the continuous phase or the drop) in level set...
View ArticleRunning FSI examples, "undefined value found"
Hi!, i am trying to run an fluid-structure example with use of the MEMS module, byt anytime i get the error "undefined value found..." for the variable mod1.v_solid. So i even downloaded the 2d fsi...
View Article3D laminer vortex
hi, I am simulating a block which filled in water, and there is a cylinder prevent the water the block.(the diameter of the cylinder is smaller than the block) I am using laminer flow and hoping to see...
View ArticleError about 'Failed to find consistent initial values. Last time step is not...
Hi, I am a new user of COMSOL. I've set up my reactor geometry model and successfully applied the turbulent flow (stationary condition) in my reactor model. However, when I try to simulate my reactor...
View ArticleProlonged error with "Last Time Step Not Converged"
Dear sir, We were trying out "PIPE FLOW MODULE" as you have suggested. And thanks for the advice, as it has reduced the number of mesh elements to a larger extent. But, we were getting a consistent...
View ArticleSingle phase flow with heat transfer in vertical tube
Hi, Actually, i am trying to model two phase flow in vertical tube. So, as I am new in COMSOL, i AM STARTING WITH SINGLE PHASE FLOW WITH HEAT TRANSFER IN VERTICAL TUBE. for LAMINAR FLOW my MODEL IS...
View ArticleError with the laminar flow inlet in plasma simulations
Hello! Using the laminar flow for plasma processes I have had some errors when the section of the inlet is small. I am trying to simulate a chamber where the inlet section has a radius of 0.0025 m, so...
View ArticleHow can I find the flow velocity of a specific coordinate point
Dear all, I would like to ask how can I find the flow velocity of a specific point (x=105, y=2.5) in my channel (it is shown in the picture). In the graph, if I click at any random point I got 3...
View ArticleConvergence behaviour in a stationary solver
Dear Comsol gurus, I have been dealing with a CFD/transport of diluted species (TDS) simulation for a while and I was hoping you could bring some light to the subject. I am simulating a flow in a micro...
View ArticleFluid flow channel in cantilever beam
Hello, My model is the following: a cantilever beam has one longitudinal channel containing a fluid flow. My goal is to find the effects of the fluid flow (viscosity, velocity, size of the channel) on...
View ArticleHow to find temperature variation for a single element in my model
My model has 7 elements as a whole. I am able to plot the temperature variations of the whole model but not for any separate element in the model. I request if somebody helps me know how to plot the...
View Articleold model cannot be reconstructed....
I am attempting to build on a model using Darcy's law to model solute transport under saturated conditions. The original model was built in COMSOL 3.5a, and I get an error message "Old model cannot be...
View ArticlePeristaltic Pump Model
Veryst's peristaltic pump model is practically identical to what I need to create (designing a muffin batter pump and would really like to model it)! Unfortunately I'm a student so I can't just hire...
View ArticleSessile droplet
I want to put a sessile droplet inside a channel. How to create a droplet of a specific material ? and how do I choose the model ? As a reference I was wondering about the model in one the Paper - A...
View ArticleAssigning material properties to an interior volume
I want to assign the empty volume within a closed container to be a fluid and assign material propertied to this fluid. I imported a closed 3D model that is made up of a number of solid parts contained...
View ArticleDifficulties with #985 Peristaltic Pump Model
Hi All (bear with me; I'm new) Working my way through the peristaltic pump tutorial and all has been a-okay thus far but once I get to the plot of the total volume (bottom of pg. 14) when I try to...
View Articleparticle deformation througn a contrained channel
Hi there, I am doing COMSOL simulation to see the behavior of a particle flow through a microchannel. There is a area of the channel where particle size is greater than the cross section. So the...
View ArticlePossible to export the streamline coordinates?
Hi, I am only using the laminar flow conditions, I have plotted the streamline after the simulation, is there anyway to get the streamline coordinate from the simulation? I like to export it if it is...
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