Ansys Fluent Tutorial for beginners | Multiphase Flow | Three Phases | Ansys Workbench
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Fundamental Fluid mechanics:
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Step by step tutorial to simulate the flow of water and oil in a tank.
Mesh generation using Ansys workbench
Naming the boundaries (Named Selection)
Setting up a transient simulation
Importing new fluids from fluent database
Selecting the number of phases for volume of fluid model
Specifying fluids for VOF model
Specifying the boundary conditions as two velocity inlets and a pressure outlet
Initializing the solution
Patching the domain
Specifying the time step value, Number of time steps
Calculation of results
Creating an animation using fluent
Converting the frames to animation in fluent
Viewing the animation
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![[CFD] Eulerian Multi-Phase Modelling](http://i.ytimg.com/vi/6BJauDTpCmo/mqdefault.jpg)
Your videos are so clear and precise. Thank you !!
nice video. no going back and forth. no fixing some forgotten value etc. I like the flow of your work. Thank you!
Ozgur Bozkurt, Thanks for your appreciation!
Extremely great work. Thank you very much for sharing this video. This helped me a lot.
Thank you so much Prashant!
Hi, I want to ask how to check a moment when all of three phases are have the same amount in a tank? I mean, when the tank contains the same amount of every phase (oil 1/3 water 1/3 and air 1/3)
Hi! it is showing floating point exception. Tried simulating the effect of air flow on water jet using vof model. Any help?
It's really do me a Very Big favor ! I really appreciate the channel ! Will you keep making this kind of tutorial video about Ansys Fluent ?
Thank you for your appreciation.
I tried this simulation with slightly different geometry but needed open channel flow set for it to converge for continuity. Any idea why this is the case?
hi, I have finished running the calculation and a .cxa file has been saved. Can you please tell me on how I convert the .cxa to a video file? Because I don't have any video file such as at 8:40 as I only have .cxa file. Thank You
what if "number of time steps" is set to automatic. how do i change it?
Thank you so much.
Can u share a simple video tutorial on airborne dust simulation in underground tunnel ?
say tunnel dimension 5mX5m and having length of 100m.
airflow is 50 m3/s.
dust injection rate at a point source in the tunnel may be 0.1g/s
thanks man .what is different between mixture and volume of fluid?
great job by MECH Tech.
Thank you so much homer simpson!
Hello..can u explain how to add solid Nacl as a phase for my simulation of osmosis ?
Thanks a lot for this video. Its really very helpful.
Glad it was helpful! Subscribe and share to your friends.
hi can you do a video on how to the set up for results/graph for this video above?
Very informative video, thank you.
Thank You..
can we do dehumidificaton analysis of Desicant wheel on ansys
Thank you that is good and easily understandable plus enjoyin ss well
Glad you enjoyed it
Please do an updated one for Ansys 2024 Student version if possible, thank you so much for this video.
Thank you so much for your kind words. I was actually considering creating videos with the latest versions already, so your reminder is greatly appreciated. I'll get to it soon.
Thank you for the video. It is really helpful. Can you post a video about a wheel on the road when raining? The aquaplaning scenario. Just a suggestion. Thanks a lot.
Sure. I'll try to do it.
helpful
Great Work Help me alot....👍👍
Glad to hear that
Dear admin, Thanks a lot for all your tutorial videos. Btw, do you have any simulation tutorials of mixing ion-exchange resin (granular particles) and water in a vessel with air? like there are half water and half resin in a vessel, then we mix its with air (blow from the lower of the vessel)? Thank You, God Bless.
Thanks for your suggestion. I'll try..
thank you keep it up..
Thank you for your motivation ronak hingu.
I am getting segmentation fault error during setup @02:36
Plzz help me out
Hi, thanks for the video. I would like to know if you have 3 gas say (Argon/air/Nitrogen) like this. Can we use the same multiphase model or different one. Also what would be the surface interaction for these gases ?
You could modify the material properties (for any gas) also you could input the appropriate surface tension, contact angle etc., try this..
See the video. On 4:20 minutes, i've did it.
Sir, Iam unable to find the solution animation option in calculation activities .... I wan unable to create the animation in ansys ... Can you please resolve this issue??
did you find the solution?
Nice explanation!
Thank you. Subscribe and share it to your friends.
great
Thank u..
This video was very useful for me. Do you have any idea counterflow air and water liquid flow evaporation model between the interface? Any video, document or something else? Our system has two phase, air phase is flow over liquid droplets. So there are an evaporation and mass transfer between phases how can I modelled this situation?
Thank you for your precious time...
Hey oğuz dalkıran
I too am in need of the same. Please do help me if you have found any solution.
Thanks
@@akashgovindkuttikad2232 any luck as i want to do the same ??
At 4:10 how to determine the surface tension coefficient values? Is there a binary chart for it?
Great video btw thank you
Not sure about any standard charts. I have taken the value of surface tension between Oil and water, Oil and air, Water and air from some website..
Nice work
Thank you so much for your appreciation Ramesh Babu.
Helpful
Thank you..
Thank you, could you please tell me which multiphase option should i go for mixing of steam and water with heat transfer? I cannot use 2d model because my setup have tilted channels that be analysed in 2d.
VOF model is suitable only for simulating the interaction between two or more immiscible fluids. Please try Mixture or Eulerian Model.
www.afs.enea.it/project/neptunius/docs/fluent/html/th/node293.htm
This video is very helpful for me but i get confuse that if both water and oil inlet is near to each other and outlet is in another side of the figure than how this problem can solve . where after mixing oil and water ,mixing fluid can eject another outlet side .
Its not a big deal. Positioning the inlet and outlet is all about the geometry creation and named selection (boundary condition). If you want to make the fluid domain to overflow, nothing big in that simulation. Both of the following cases would make the domain to overflow.
1. Simulate the case for some more time. (Even the simulation detailed in this video can be made to overflow if the total number of time step is increased)
2. Another way, if you reduce the size of the container (flow domain), obviously there would not be enough space for the fluids to dwell, hence it would overflow.
Hope, i have answered your question. If not, please let me know.
Hello,
I thank you for your generosity.
I need help with my thesis project. I can not have results. Can someone enlighten me?
Thank you. Let me try..
Super bro
Thank you bro..
Sir how two model three different liquids in ANSYS FLUENT? These fluids don't undergo mixing. These are just flowing through a straight tube.
You can do the same as explained in this tutorial. Just replace this tank geometry to pipe..!
Hello, I am currently trying to learn about this simulation. However, even when I enter the mesh download window shown in the detailed description, it says that it cannot connect. Can I get the mesh for this simulation again?
Apologies...! Just to let you know, I recently switched my domain from mecht.in to mechtechsimulations.com
How can we model humidity effect on thermal cycling?
Not sure, but I think you have to use Species model & have to specify the species mass fraction at the boundaries based on the required humidity.
how can you make the materials available that helped you create this video? how did you come to the conclusion that in the 0.072 part? this value of 0.072 and default? in outline condition how did you define those values? I'm doing a lawyer's job for my engineering and I'm having a hard time.
I am not clear about your question. Are you asking the value of surface tension between air and water? If so, the surface tension between air and water at atmospheric temperature is approximately 0.072 N/m.
Is the first phase the air filling the domain at t=o? Is this air stationary?
Of course, at t=0, the whole domain is filled with air and its stationary. That is made possible by patching the domain. In due course, the water and oil are made to flow in the domain as 't' starts to count up.
Hello, I have initial concentration of CO2 released from people ,of initial concentration 40000 ppm .How to define this condition ?? in cell zone condition (source term ) or boundary condition? And how to covert unit?
Source term is the correction option in your case. You can define a region/zone and specify it.
You have to convert the ppm to species mass fraction. Let's assume you have a mixture with a molecular weight of CO2 of 44 g/mol, and you know the density of the mixture is 1.2 kg/m³. You want to convert a CO2 concentration of 40000 ppm to mass fraction.
Calculate the mass of CO2 in the mixture:
Mass of CO2 = (Concentration in ppm) * (Molecular weight of CO2) * (Density of mixture)
= (40000 ppm) * (44 g/mol) * (1.2 kg/m³)
= 2112 g/m³
Calculate the mass fraction of CO2:
Mass fraction of CO2 = (Mass of CO2) / (Total mass of mixture)
= (2112 g/m³) / (Density of mixture)
= 2112 g/m³ / 1200 g/m³
= 1.76
Therefore, the mass fraction of CO2 in the mixture is 1.76.
You can simulate a diving device underwater to calculate it. help me
Raef Kobeissi have published a video on the thing what you need. Go through it, hope it help to you. Feel free to communicate further!
czcams.com/video/OiO9X9fes2I/video.html
Hi could you please make a video on mass flow/flux inlet for same above case
Hi,
I want to simulate a transient two-phase flow with VOF in porous media considering capillary action. The porous zone is initially filled with air. I want to model the displacement of air with liquid water due to capillary forces. My main interest is the degree of wetting and the spreading of the wetting front. How to model capillary effects in the porous zone?
@@vikashkumar-cr7ee have u got that?
Sir can u please help me how to mix diesel and methane in ic engine
Dear Ganduri, simulation of chemical reactions is possible by enabling the species option.
@@MechTechSimulations tq sir can u send me how to do that simulation
video link or files sir plz
Hi, how could I create an oil and water inlet?
Dear CUERVO Curioso, it's essential to follow the three steps to create the inlets as you desire.
*Initially you have to create a named selection (@ Mesher) for the boundary where you desire to keep as inlets. (Watch the video- 1.26 minutes)
*Import the required fluids from the Fluent library. (3.01 minutes)
*Then you can specify the oil/water inlet at the boundary condition tab in Fluent (4.46 minutes)
Check where you have missed out!
Hope it help u...
MECH Tech. Ty very much :D
how can i decide the surface tension between faces
Surface tension is usually found between a liquid and a gas, or two liquids. Its available in several literature. Say, surface tension between water and air is around 72 mN/m at 20 °C.
en.wikipedia.org/wiki/Surface-tension_values
Its effect on the contact region between a liquid and a solid wall is expressed in terms of contact angle. Higher the contact angle, lower the wettability of liquid on the surface.
www.kruss-scientific.com/services/education-theory/glossary/contact-angle/
if i make an elliptical surface, how should I set up the parameters?
Do you mean, the flow domain as elliptical?
What do you mean by parameters?
@@MechTechSimulations yes. the flow domain is elliptical. i am trying to simulate it it is not showing and effect, if you give me your email id i will show you.
although this elliptical surface will have a vortex generation.
What if we didnt make the hole in the middle ? I tried.... The fluid on both sides will not flow.
How can a mass of fluid get in a control volume without some mass getting out of it?
The hole in the middle acts as outlet through which the air already inside the volume is sent out [while water and oil are getting in]
instead of 2D can i do it in 3D with the same settings?
Already it is Transient & Multiphase. If you do it in 3D it will take more time to solve..
hi, is there a link to download ur mesh/geometry above?
Yes, Jason Lee. I have provided a link in the description section which has the dimensions of the geometry and the geometry file itself!
@@MechTechSimulations sorry sir, why i cant use the geometry file after i import it?
Sir how to maintain the quantity
of the fluid using fluent ??plz explain
You can provide the mass flow rate, or velocity (volume flow rate) at the inlet.
czcams.com/video/rN2-gWYpH-c/video.html
How to find pouring time (mold cavity filling time) using Ansys
Why do you need ansys for calculating that? Why cant you simply calculate it analytically if you know the volume of cavity and flow rate of fluid?
@@MechTechSimulations Yes, I have calculated analytically but want to verify on Ansys.
Can you help me on condensation- evaporation problem in multiphase model...please give me your contact
where do I download your geometry?
czcams.com/users/redirect?redir_token=EMGjZ76MweP4a3UnER6HCdaD8lN8MTUyODczODk3N0AxNTI4NjUyNTc3&event=comments&q=https%3A%2F%2Fdrive.google.com%2Fdrive%2Ffolders%2F15rQPNXRn51A3_0yxAiXkqHs7JBV6Y8WT%3Fusp%3Dsharing
Ty so much!
dimension of tank
Dear Murugan, Thank you for your interest. This tutorial is meant for practicing a basic multi-phase simulation. You could try the same on a geometry that you desire..
Neverthless, I herewith share the dimensions and the geometry file as well!
drive.google.com/drive/folders/15rQPNXRn51A3_0yxAiXkqHs7JBV6Y8WT?usp=sharing
Happy learning!
how to create this geometry in workbench
It will not be a big deal for you. Just try it, its easy!
czcams.com/users/redirect?redir_token=EMGjZ76MweP4a3UnER6HCdaD8lN8MTUyODczODk3N0AxNTI4NjUyNTc3&event=comments&q=https%3A%2F%2Fdrive.google.com%2Fdrive%2Ffolders%2F15rQPNXRn51A3_0yxAiXkqHs7JBV6Y8WT%3Fusp%3Dsharing
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