ANSYS Fluent Tutorial: CFD analysis of Flow in a Porous Media | ANSYS Beginners Tutorials | CFD
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- Опубликовано: 12 сен 2024
- A CFD analysis of fluid flow in a porous media using ANSYS Fluent.
Here is the link of the file which contains the Boundary condition details: drive.google.c...
![[CFD] Porous Zones in CFD](http://i.ytimg.com/vi/sOQMXxoKFQM/mqdefault.jpg)
It is a good presentation,
Because why are the inertial resistance and viscous resistance in the y and z direction great with 100 times than x direction?
also do you think i can apply this method to study the flow of co2 in porous media ? cos i've tried it but i dont know how to put in the value for the viscous resistance and inertial resistance. please reply me soon. thanks!!
Hello tutor! Great works. Keep it up. But please, can you use this 3D geometry (porous media) to simulate two phase flow (e.g liquid water & air) as your next tutorial?
Great suggestion! I will try to make a tutorial.
There are numbers that you entered at the initial conditions for the porous material
zone
Are these constants for all cases, or do they depend on the existing condition????
If the porous zone is laminar, shouldn't the inertial resistance factor be zero as given in the ANSYS manual?
Yes, you should consider as 0
I'm modeling air flow . What value average particle diameter should I take to calculate viscous resistance? and why is fluid porosity 1?
Hi, I have free fluid and porous medium fluid, both flowing parallel. The interface between them allows fluid to flow from one section to other. When porosity is 30%, I see abnormal patches of higher velocity near interface inside the porous bed. I am wondering why this happens? For higher porosity, I don't see such type of patches. I use k-e RNG or realizable model, scalable wall function, Physical velocity in bed, I consider both inertial and viscous resistance. Could you please help me? Do you have any document explaining best practices for flow simulation in porous media?
How to change pore diameter of porous medium.. please make a video or explain in detail
You need to define it in the cell zone conditions using the approximate relationship. As the pore sizes cant be seen or created using the geometry ,you only can refine the resistance.
Although it's an old video I am hoping for a reply.
After reaching the maximum value why is the mass flow rate going negative on the inlet?
I have a porous media consisting of glass beads the flow in the porous media is laminar. I calculated the viscous resistance in 2-D geometry and substitute. i need to calculate the water mass flow rate at the 5-outlet should be the same. it is actually the same on the 5 outlets at the start but it goes down to zero as the iteration increases. I need to know why it goes negative same it is going to be negative in your case also.
Thank you so much, but I have a question considering, why the porosity is equal to 1, I saw that your excel file is 0.3.
what is the name of this shape ??
Hi,sir, I did not find how to show the mass flow rate graph, because the version of ANSYS is 19.2, so maybe something is changed.
could you tell me how to show the Mass Flow Rate in graph? Thank you so much.
Thank you sir for this video
My question is
I will using silica gel or sio2 in the column
first condition for it become blue color and dry
and after it absortion the humidity from the air before using in the cooling system it become in the second state wet and pink color
and it become saturation so it cannot work to absorption more humidity
So for return it to the first condition i will regeneration it by using hot air
( 65c or 70c or 75c) degree
I will using ansys fluent cfd for simulation but there is no sio2 in this program or how i can add this new material sio2 in the wet state and pink color
Sio2 or silica gel
Diameter 4 - 5 mm
Intensity 5%
Hydraulic diameter 40 mm
velocity inlet 22 m/s
Diameter for Column 30 cm
And high is 20 cm
My best regard
You need to add the material properties for the wet SiO2 using the fluent material database. To define the intensity you need to insert the volume fraction while doing standard initialization, for particle diameter you need to insert the DPM model in multiphase flow.
Thank you sir
Can you explain how i can add the new material wet silica gel because i can found it in the database and it first state pink color and in the second state it become dry and blue color but still solid state
Sir
Can you teach me or explain me because i need it for my steady
Thank you sir
You true champion!
thank you::))
Ansys-Tutor Are these values directly given in tutorial guide or you have solved the equations for obtaining the parameter values? Thank u in advance ☺️
there values are taken directly from tutorial guide.
Ansys-Tutor Thank you ☺️
My pressure drops immediately to zero upon leaving the inlet zone and remains at zero through the porous and outlet zones. Any ideas why this is occurring?
check the veocity ,if its changing or behaving abnormally.
how to calculate Direction Viscous Resistance (1/m2) Inertial Resistance (1/m) sir?, can you expalin?
Very Nice tutorial. Can you please add extra slide at the end to explain the input parameters for porous medium ?
Thank you for your suggestion , will upload a PDF file soon which will contains all the Boundary conditions detail.
Here is the link drive.google.com/file/d/1TwGdxHNZkxb3K8tkrAnfQT2C5f-dB4ZD/view?usp=sharing
Is there any video on reverse osmosis or forward osmosis to perform in ANSYS fluent?
If you have any research paper or journal related to this work then please send us if possible will try to make a tutorial for you. ansystutor7@gmail.com
thank you for your tutorial!
most welcome:)
Thanks for the video! Could you conduct a porous media heat transfer problem in the future?
Will try to.
Is this same as catalytic converter
Thank you for your effort
I tried to simulate the same case but when I apply the streamline simulation, I found that Ansys treated every zone (inlet, outlet, and porous zone) as a separated zone.
the particle doesn't travel from the inlet to the outlet, it's stop in the middle. Could you help?
have you increased the no of streamlines? Check once.
yea but it's not the problem. I'd appreciate it a lot if you can check my problem on cfd-online.
www.cfd-online.com/Forums/fluent/201451-modeling-pipe-made-porous-material.html
kindly inform me if you have any ideas
You can send me the images to my email: ansystutor7@gmail.com
sent
@@AnsysTutor what is # of contours
Ansys-Tutor, why do you use the COUPLED method and not the SIMPLE or SIMPLEC for pressure-velocity coupling?
It depends on you. Coupled solver solves all the equations simultaneously while simple solver solves the equations one by one.
In terms of time per iteration, coupled solver takes longer. Eg. in an hour simple solver can have 500 iterations while coupled solver can only have 100. But in terms of bringing the residuals down, within an hour, simple solver can bring continuity for example down to 1e-3 with 500 iterations but coupled can bring it down to 1e-5 with 100 iterations.
How low your residuals are can be one of the factors that your solution has converged other than inspecting the actual values that you`re chasing after, say in the case of a 2d Airfoil, we are after the CL and CD. Simply, coupled solver gives faster results at the expense of low time per iteration but who cares since within one hour coupled solver can give better accuracy than simple solver.
From where all the values of the parameters are taken? Like all the values which are taken for results.... and why k-epsilon is taken?
The values of the parameters are obtained from ANSYS Tutorial manual. as the flow should be turbulent that's why k-epsilon turbulence model has been chosen.
Ansys-Tutor thank you sir... cheers ☺️
Ansys-Tutor Are these values directly given or you have solved the equations for obtaining the parameter values? Thank u in advance ☺️
Can this model be used for Oil/water separation? like a twin tube membrane, and the oil/water streams get separated? working on my project would be great if you can help me out.Thx
sorry i don't have any knowledge regarding this matter.
how can you calculate Direction Viscous Resistance (1/m2) Inertial Resistance (1/m) ? Thanks!
Viscous Resistance = 1 chia cho do tham
thanks a lot...
can you tell me detail about parameter in porous zone
Sir i consider regenerator as a porous medium and with steady flow and inlet pressure. I have to calculate temperature at outlet of helium gas which has low temperature. I have to calculate pressure at outlet?
for this i have to calculate heat transfer coefficient which is function of reynolds number and prandtl number. In prandtl no. specific heat is there. how to put specific heat in fluent. please help me
you have to first turn on enery equation , so after that you can be able to see specific heat option in the material properties table.
Sir is this same as catalytic converter?
It's outer geometry is similar to that, but it is not a catalytic converter .
@@AnsysTutor Can this be modelled as a Exhaust Heat Exchanger
nice tutorial! i need to simulate a basket in my model through porous media, do you know how to calculate the porous media parameters?
You need to find some of the research papers in which such kind of works had been done. From there you can find the input parameters for the basket material.
@@AnsysTutor thanks for your reply. I am actually the first one doing this simulation on this kind of model. i have already done exoerimental testings in the lab and i have pressure head and velocities. Any idea?
Suggest me any video on hollow fibre membrane
help - not showing turbulence box while boundary cnditions in my laptop
you need to select the turbulence model first,
@@AnsysTutor from where..what does this mean
in setup-> model >Viscous-> change to k-epsilon or any turbulence model (by default laminar)
@@AnsysTutor tysm✌
Please explain the parameters in the cell zone condition - porous section?
The porous region only defined as the laminar flow region while the actual flow is turbulent. All the parameters like velocity and tempr are given at the inlet.
Sir how we can make hollow fibre membrane
Please share more details about that. mail us the geometry details to ansystutor7@gmail.com . Will try to make a tutorial if possible.
How do we get the turbulent intensity
you can get through some standard formula or you can assume the value.
sir can you execute Economizer in ansys fluent ?
I have its igs file
try it urself. use automatic meshing scheme.
Ansys-Tutor can you guide me through email
email doesn't exist any letter missing?
Contact region is still coming..how do I avoid it?
Make all the geometry as one part or just simply delete the contact surfaces.
having it deleted is ok
I am not getting anything in cell zone condition
define the zones in meshing, as named selection for the bodies.
I did that...But still not visible...I followed the exact procedure as mentioned
have you done the "body selection" or "face selection" in named selection stage?
yeS
which one?? body selection or face selection????
Hello sir,,, how to give Relative humidity at the inlet and pass it moisture through this model?
this can be done in multiphase analysis.