Learning Forum

[deepa]

I'd like to know if it is possible to simulate the transport of dilute species in pipe sections like the following

 

[Rob]

Yes. More details will help...  I assume you're wanting to use CFD.

[deepa]

Hi.. Yes, I'd like to use the CFD. I am new to Ansys, so I am not sure which module has to be used.

I'd be happy to provide additional details.

I wish to build a 1D geometry of the pipe section shown in the image presented in the original post. I pipe sections with blue arrows are if radius R and the

pipe sections with red arrows are of radius R/2. I wish to solve for the velocity profile of the carrier fluid in each pipe section and couple the velocity profile

with the 1D solute transport equation ( convective and diffusive flux). Using a multiphysics module, I wish to solve for the concentration profile of the solute applying Robin boundary condition at the inlet and zero-gradient in concentration boundary condition at the outlet.

[deepa]

Looking forward to receive a response

[Rob]

I've had a lovely weekend, thanks for asking. 

For a 1D model you'll be looking at the ROM tools, and I don't think they're on the Teaching/Student licence.  The CFD tools allow you to model the system "properly", ie to model the diameter etc to give you the profile. 

[deepa]

Hello,

I am looking for simulating transport equations in blood vessels like the one presented in this study.  From what I understand, CFD package can be used for simulating flow fields.  But I am not sure if CFD module allows coupling with other physics like solute transport.

 

Could you please let me know if this is possible?

[Rob]

CFD will solve the flow on a meshed domain. We can add species models to investigate the dilution/transport of additional materials. 

If you're looking at a 1D network model rather than an exact flow solution you need to look at some of the other tools. 

[deepa]

Hi, Thanks a lot for the response. I'd a look at ROM tools that you had mentioned. Is there any other tool?

Also, could you please let me know which version of Ansys has ROM tools. At my university, we've a license for Ansys 13.

 

Also, could you please explain if varying diameters of pipe sections in a network, will be accounted for in a 1D network model?

[Rob]

Pipe networks would be Twin Builder, and that's not in R13 and possibly not available by default with 2019Rx and 2020R1 for the campus licence. You'll need to contact us (big button on ansys.com) to sort some of that out. 

1D networks rely on you coding up the network: so if you account for the diameter, length etc it will be included.  The CFD tools will account for the diameter, length etc as it's part of the 3d geometry that you'll need to build.