[Avocad]

I am simulating a 2D Microfluidics problem.

Water is entering in the middle left capilllary tube, and oil is coming from the top and bottom left sides. They are suppose to form a droplet and continue onto the entrance of the tube to the right, but they seem to ignore my boundaries. Furthmore, the droplet I created seems to be too large to enter the nozzle to the right. I have to incorporate navier stokes along with interfacial tension.

https://streamable.com/ehsim

I have set up edges(inlet, walls, outlet, etc.) in the Geometry section with DesignModeler, and have the boundaries transferred from that to the setup section. In the setup section I specified it as a stationary wall with no slip.

Does anyone know why it is ignoring my boundaries? I am fairly new to ANSYS Fluent and would love some help! Thanks a lot.

[AlexanderZ]

what type do you boundaries have? Probably interior? Change to wall

best regards

[Avocad]

Originally Posted by AlexanderZ

what type do you boundaries have? Probably interior? Change to wall

best regards

Hello AlexanderZ, thanks for the reply.

All my boundares are wall boundaries. Except I noticed that 'interior surface body' were of the type 'interior,' so I switched it to 'wall.' Now I am having:

Error: floating point exception
Error Object: #f

I have searched up online and am trying my best to fix it. If you have any idea on how to fix this that would be great! Again thanks for the reply.

[AlexanderZ]

make a sketch of domain, name regions

why do you have fluid in all regions of domain?

best regards

[Avocad]

Originally Posted by AlexanderZ

make a sketch of domain, name regions

why do you have fluid in all regions of domain?

best regards

I have fluid in all regions of domain because fluids are passing through that domain. I have changed the material type in mesh section to 'Defined by geometry(solid' to see if it would make a difference instead of fluid.