IES-VE User Forum

Hi All,
I am trying to model a car park with supply, extract and jet fans. Earlier, I was under impression that jet fans can not be modeled in Microflow but I bumped into link below where it has been done.

http://www.iesve.com/consulting/project ... fd&id=4026

They have perfectly modeled car park with jet fans. Anyone having any idea how to do that ? Any help would be really appreciated.

The example quoted is not from MicroFlo. It was done by the consulting department using a different software as requested by the client.

MicroFlo can do axial jet fans using the fan interface boundary as described in the user manual.

I see. Thanks for the reply. Also, when i am running analysis assigning boundary conditions to generic components, result is showing everything in grey ? Have to ever faced this ?

It looks like the solver diverged. This could happen mainly due to grid quality used for the simulation.

Recommended grid quality is to keep maximum cell aspect ratio under 10.

Also as far as possible, keep the supplies and extracts on planes which are parallel to coordinate axes plane. Align the edges of components, boundary conditions with each other. This would definitely help improve grid quality.

Don't go too overboard with using components for boundary conditions just because you can. Rationalise and take engineering judgement when using components. e.g. lets say you are using component to mount a 'supply diffuser'. the face of component is 1mx1m and the diffuser is 0.95mx0.95m. Just assume the diffuser is full size of the face. having that 2.5cm gap around the face is going to harm your grid and results rather than give an 'accurate' depiction of flow. That is because that gap would ideally need a grid size of 2.5mm which due to nature of grid in MicroFlo, you wont be able to model.

If you could attach a picture of geometry you are trying to simulate, I may comment more.