Hello autodesk community!

[Anonymous]

Can someone help me regarding on my thesis entitled "Design and Simulation of Disinfecting Tunnel using Organic Disinfectant"? Its my first time to use Autodesk CFD, I want to simulate airflow inside the tunnel of our design. I'll already watch tutorial in youtube and try to do the simulation. But unfortunately I was not able to come up in a result due to error. I want to use transient because our design is time dependent. Thank for the answer and God bless. please see the attached file for reference of our design.

[marwan_azzam]

Hello,

Please post the support share file (*.cfz) of the model with us and we'll take a look.

You'd have to zip it in order to share on the forum.

cheers,

Marwan

[Anonymous]

Hello Mr. Marwan please see the attached .cfz file of our thesis design. Than you!

[marwan_azzam]

Hello,

Please post the support share file (*.cfz) of the model...

You sent the cfdst file.

cheers,

Marwan

[Anonymous]

Hello Mr. Marwan here is your requested .cfz file, please see the attached file for your reference. Thank you!

[marwan_azzam]

Hello,

Thank you for sending the model.

I ran it as is and it didn't generate any errors as you state in the original post.

However, the flow through the nozzle is blocked as seen in image below.

Having said that, the model needs work:

1- Finer mesh overall.  Mesh is too coarse.

2- Activate Wall Layers.  They are turned off by default when you have motion but since your moving parts are outside the fluid domain to start with it's OK to turn wall layers on.

3- Create a refinement region around the nozzle(s) to better capture the flow.

4- Suppress the SS part, no need for it.

5- Set Inner Iterations to 1.  I don't think you need 4.

Marwan

[marwan_azzam · Accepted solution]

Adding "image below"

[Anonymous]

hello Mr. Marwan, may I ask what is SS? and how can I suppress it? because its my first time using simulation software. And where can I activate wall layers? and how can I refine the region of the nozzle? by the way I used water vapor as my airflow. Thank you for your answer Mr. Marwan.

[marwan_azzam]

Hello,

SS = Stainless Steel.

There are a couple of ways to suppress a part.  The image below shows one way.

Wall Layers can be activated as shown in this image:

A refinement region an be defined as shown below:

[Anonymous]

Hello Mr. Marwan, Will it also be possible to identify which parts of an object will receive the greatest and least amount of fog after the cycle? I mean, after the disinfection of the item / bag pack.  Something like in the image attached here.