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Questions related from Bacha Munir
As to the title, I have computed a gas-liquid two-phase flow by "laminar-flow,level-set ". I wish to get the velocity of the head of the bubble vs. time, i.e., the velocity of the...
17 April 2023 4,361 6 View
Hi. I ahve simulated a drop flowing in a channel using level set method in COMSOL. Now I am interested to extract data of droplet shape (morphology) at different locations. How can I extraxt it?....
18 February 2023 3,935 6 View
Hello everybody. I am simulating electrocoalescence of a pair water drops in oil bylevel set method in comsol multiphysics. My question is how I can calculate the velocity of drops during...
02 December 2022 4,110 1 View
Hi brothers. I simulated the drop flow using phase field method in COMSOl. After simulations, the flow field inside and outside the droplet is uniform and does not change due the interface. Please...
18 October 2022 903 3 View
Dear all, I have simulated laminar flow in COMSOL and want to plot the pressure versus shear rate graph. Is it possible in results>derived vales>average/line integration?. Please can someone...
01 April 2022 3,458 2 View
I am interested in solving the dimensionless equations for a bubble motion in COMSOL Multiphysics. But do not how to enter the dimensionless equations for density, viscosity, Reynolds number,...
07 March 2022 2,099 2 View
I am simulating a gas displacing a viscous fluid in a cylinder using COMSOL. The flow is plane symmetric with low Reynolds number. I am applying flow rate as inlet while zero pressure at the...
11 August 2021 6,160 3 View
Hi dears, I am utilizing power-law model in COMSOL to study the shear-thinning (i.e. different values of the behavior index, n) effects of a fluid. However, I do not know how to calculate the...
17 November 2020 5,009 6 View
Hello dears, In COMSOL, while handling laminar two-phase flow moving mesh interface, we have to two types of nodes, one is fluid-fluid interface and the other one is external fluid interface....
06 December 2019 6,461 0 View
Hi, I want to to know the directions of velocity and pressure of a fully developed flow in tube. Dose the figure show the correct direction for pressure gradient or just pressure, when the flow...
23 November 2019 7,027 0 View
Hi friends, If we publish all papers in MDPI SCI journals during PhD studies, is it good?. Can it create some problems in future post doc apply or to apply some jobs?. What are your...
08 November 2019 5,233 6 View
Hi friends, Dels is a surface gradient operator which we applying to find the tangential velocity along a surface/arc. It can be written as...
20 September 2019 4,359 3 View
Dear friends, I a have a problem in setting the line width of a graph in COMSOL/MATLAB live link simulations. Using the command mphplot(model,'pg1', 'LineWidth', 2) dose not work. How I can set...
02 September 2019 8,873 4 View
Hi all, I am simulating moving mesh in COMSOL where I need to apply Naveir-slip boundary condition (found in literature). I do not know its role in moving mesh free surface (air-liquid) flow....
04 March 2019 4,771 3 View
Hi, I am studying micro bubbles flow in lungs for mechanical ventilation. But due to less information about bubble simulation, I cannot. Dose, anyone have some mph files which can support my...
28 February 2019 574 2 View
Hi everybody, I want to simulate a bubble moving in fluid, say blood using comsol. For such type of interfaces, to couple mesh motion with fluid motion, dose the following kinematic boundary...
17 January 2019 6,061 8 View
Hi everyone, As we applying zero pressure at the outlet of a channel for the in compressible Newtonian/non-Newtonian fluid flow, but i do not know the reality behind it. Please, if someone...
16 January 2019 7,892 6 View
Hi, I would like to write the weak form of continuity equation using cylindrical coordinates. Please, can someone explain how to write to be compatible for COMSOL implementation?. Thanks in advance.
23 December 2018 682 3 View
Dear friends, I am studying the variational formulation of Naveir Stokes equations using primitive variables. I have a little bit problem in understanding the steps (highlighted) to get equation...
01 December 2018 2,520 1 View
Dear friends, I am interested to study fluid flow in a tube by modeled based equations using COMSOL. I have modeled weak form pdes for stokes flow. When I am implementing the inlet boundary...
27 November 2018 345 6 View
Hi. Can anyone explain how we can implement surface tension forces on curved surface (gas bubble) moving in fluid using COMSOL? Thanks.
14 November 2018 7,551 4 View
Hi everybody, I have modeled my own weak form pdes from Naveir-Stokes equation for channel/tube flow. How can I implement my inlet and outlet boundary conditions in this situation. Please, if...
14 November 2018 7,057 5 View
Hi everyone, It would be great if someone explain me, how can I impose my inlet velocity and zero pressure for channel flow in COMSOL 5.3a, if I have my modeled weak form (PDEs) Naveir Stokes...
05 November 2018 7,215 3 View
Dear all, I have modeled my new weak form PDEs (for u,v and p) for channel flow using Naveir Stokes equation, which are different from existing laminar flow equations in COMSOL. Now I want solve...
04 November 2018 3,694 6 View
I am simulating the bubble motion using NS equations in COMSOL 5.3a, but the equations cannot be converged. It would be grateful, if someone point out the mistakes in the simulations. The attached...
22 October 2018 8,886 3 View
Hi all. I am solving Naveir stokes equations using FEM. After imposing the Neumann boundary condition, I have surface integral in my equation. Can please someone help me how to solve it. I know to...
02 July 2018 2,886 3 View
Hi everyone, For modeled based weak form PDEs of Naveir Stokes equation formulation in comsol, there is no inlet and outlet boundary conditions option for velocity and pressure for pipe flow,...
01 January 1970 9,602 6 View
