Learning Forum

[Geo573]

Hello, nI am king of new in Fluent. I am currently working on a valve I would like to know, is there a way for fluent to tell ma that the fluid covers the entire of the inside of the valve ? nThank you !n

[Rob]

The fluid covers all of the fluid region. Do you mean if a liquid phase fills something up? Have a look at the courses (menu at top of the page) and I think you'll have a better idea of what CFD does. n

[Geo573]

Thank you for your answernnWell what I means is that I have conditions for the fluid entering the valve, and I'd like to make sure that the fluids fills up the entire valve before getting out of it.nnIs this possible to check on ? n

[Karthik Remella]

Hello,nYes, this is possible in Fluent. Please let us know the exact goal of your simulation (similar to - I'm interested in understanding how long it takes to fill the valve). And we will try to point you to the relevant resources.nKarthikn

[Geo573]

Thank you Kremella for your answernHere is what I'm trying to do. I have a valve that is supposed to be cleaned by a fluid. Before realizing in real conditions, I have to check with Fluent if the fluid will well cover the all inside of the valve to clean it.nSo for now I've realized the CAD with design modeler, the mesh with 5 inflation layers with a first aspect ratio of 1.2, and in the setup used a k-eps model with Enhanced Wall treatment, with liquid water, with boundaries Velocity inlet (1.5 m/s, with Intensity & Hydraulic Diameter methode, 5% turbulent intensity and 0.05 m as Hydraulic Diamter (the valve is DN50)), Wall and Pressure Outlet. I use second order upwind solution methods and Standard Initialization, with Absolute Reference Frame computed from Velocity Inlet. Correct me if this is wrong.nNow I can check several results but can't seem to find anything about if the fluid covers the entire valve.n

[Rob]

Fluid means any gas or liquid (and to complicate things granular solids). So in your model the fluid has to cover all surfaces. I think you need to look at the VOF model if you're looking to see if a liquid fills something normally full of gas. n

[Geo573]

Thank you could you detail what you mean by VOF model please ? n

[Rob]

Volume of Fluid, it's a multiphase model for free surface tracking (ie water and air with with a continuous surface between the two). n