Blood flow in aorta
 

Hello. I need to determine physical dimensions of blood flow in abdominal aorta. Can you tell me how to insert profile velocity in function of time as inlet boundary? I attached velocity function of time.

A user function with a 1D interpolation will do it easily.

Can you describe how to do it?I started recently to use CFX.

Function
 

Dear friend

I am also doing the same problem .
I want to know how did you get the graph?
what function did you use to get the graph?
I also need this answer. please give your answer if you find.

Thank you

Govind

This should help you out:

http://www.edr.no/blogg/ansys_blogge...nsient_profile

Regards

My professor is working with vascular problems. He measured blood velocity in coronal arthery. I adjusted his values for my problem.

My professor is working with vascular problems. He measured blood velocity in coronal arthery. I adjusted his values for my problem.


Dear milasko

How your professor got the values .what function did he use for getting number of values.
if he uses any function like sin or cos please let me know.I need it urgently. I assume that without a function cannot get number values . am I right?
what equation did he use to plot the graph?


Thank you

kmgraju

I think that he performed examing on the pacient.I didn`t ask.The reason is that he is not at my department, I took exam because I earlier worked in FLUENT some simple cases.

I fill out csv file format for profile boundary condition. when I try to initialise profile data I receive error "Invalid data heading seen in profil `ulaz` at line 8. Between 1 and 3 spatial field names must be specified." Can you tell me what is wrong? I attached picture of profile boundary condition.

"Between 1 and 3 spatial field names must be specified."

You specify X,Y,Z,t == 4 "spatial" fields. If you want to include time you must remove one of the spatial fields.

Ok.I understand. I didn`t know that I can`t specify more than 3 fields.Thanks a lot.

I realise this is a few months old, but was wondering about something similar, I've looked through the website that was suggested and wondered what the spacial fields actually represent? At the moment I just have time and velocity

Spatial fields have function to identify nodes positions to which you have dedicate velocity

That makes sense and is what I suspected anyway, but when I run my simulation it seems to not let me view more than one time-step, I only have 0, though the function file I made says it should last 1 second, do you know how I'd fix this so I could view it at different points within my 1 second?

Take a look on 5th post.You would notice that you need to set different time value for other steps

Do you mean different values as in:

this

Yes, like that

I had done that before, what I'm asking is if there is a way to view the fluid at say the first time-frame and the last, similar to the example in the 5th post? I can't find this...

you need to perform calculation and after that using CFD-Post you can see fluid velocities

Hi

Is your flow in the x direction?

I think so, but it might be in the -x direction

No, it isn`t in X direction. I have velocities in 3 direction, see post 9

I don't understand what you mean?

I have my plane on the y-z axis and the flow normal to that, hence my spacial fields are all plotted x-y.

I am however, quite new to this, and none of my peers are at such a high level as these are individual projects so I know nobody near here to help me as we are all using different software. If you believe I have made an error would you mind helping?

I am trying to plot the flow for this. Which is the LAD coronary artery.

I'm not sure the pulsatile aspect of this is working for me, it seems not to change velocity with any function of time...any help?

Can you tell me how to insert the same boundary profile in FLUENT? I read UDF manual for fluent but I didn`t understand. Also, I read post, but I still don`t know.

Hi friends !
I'm a beginner, Maybe my question is a little bit off the topic. I wonder how can i find a proper geometry for the Aortic Arch? I have found out that to design the geometry I might use multiple CAT images of aortic arch, so I can combine them in order to make the whole vessel.
Any helps would be appreciated ~

Regards
Mojtaba

I designed my geometry using software Materialise Mimics.

Regards!