Divergence detected in AMG solver: k,epsilon,Increasing relaxation sweep?

I'm simulation maxing of jets problem in ANSYS (Fluent solver) for Mach 1.86 jets where jets are issuing from convergent-divergent nozzle into free atmosphere. The main highlights of simulation...

04 May 2018 7,983 3 View

What will the value of Supersonic/Initial Gauge Pressure corresponds to different NPR in the simulation of Supersonic jets in fluent solver ?

While doing 2D simulation of underexposed and over-expanded supersonic jets my results is getting converged with low NPRs (2-4) with choosing Zero Supersonic/Initial Gauge Pressure at the inlet of...

04 May 2017 1,241 1 View

How can I take time step size and number of time steps for unsteady simulation in ANSYS FLUENT?

I am going the run the unsteady simulations on airflow through the Human Respiratory tract and have done the steady one. I am confusing about the selection of time step size and number of time...

11 December 2015 2,904 3 View

How might one fix the boundary condition with pressure inlet and pressure outlet bcs at inlet and outlet in CFD simulation?

In CFD simulation of airflow from human airways with the cases of inhalation exhalation, how to fixed the boundary condition with Pressure inlet and pressure outlet ? In my case pressure is...

07 August 2015 8,860 17 View

How do I write ufd in cyclic breathing condition for human respiratory system in fluent solver?

I am working on human airways. My geometry is CT scan based from mouth to sixth generation. I want to run the CFD simulation for cyclic breathing (complete process of inhalation and exhalation)....

07 August 2015 8,772 2 View

Why are the velocities so high in my Boussinesq approximation Fluent simulation?

Hello, I have a mechanism where air rises due to convective flows. In this simulation, nothing is driving the air except this. I understand that the Boussinesq approximation only works for small...

02 March 2021 4,910 3 View

How to show arrows over the streamlines in CFD-post?

I follow this to make streamlines like the photos attached below: (software- CFD post-processing) First I plot the 2D streamline over a surface "streamline 1". them I plot a vector by the...

01 March 2021 8,668 3 View

What is recommended for solid domain in ANSYS FLUENT?

Should I mesh the solid domain ? or should I use wall thickness? or Shell conduction? for Heat Transfer between two fluids of a Heat Exchanger. what is recommended?

01 March 2021 9,785 3 View

Can Virtual Servers (remote dekstop manager) run heavy ANSYS Fluent CFD simulation ?

I have a virtual machine. My host Pc specs are not that good thats why i went for virtual servers. so basically my host pc has 8gb of ram with nvidia quadro k2200 4Gb DDR5 GPU ,processor intel...

01 March 2021 8,415 1 View

How to increase mesh quality of a cfd model in ansys fluent?

How can one improve mesh skewness, orthogonality, aspect ratio?

28 February 2021 7,730 3 View

How do you mesh a thin solid in Fluent?

Hello, I have used the shell function on SpaceClaim to create thin solids for the model I am studying. These are contained within an enclosure for my study. I chose this approach as it avoids the...

24 February 2021 8,856 3 View

How to extract the y+ value from fluent ?

I am doing a 3D steady simulation of a wind rotor using Ansys Fluent. In order to have a y+ of 1, I created 10 inflation layers using total layer thickness method, and I started a first...

23 February 2021 2,819 3 View

Help with assigning pressure boundary conditions in FLUENT on a large structure?

Hello, I created a very tall tower (>1000m) and applied pressure boundary conditions at the inlet (bottom) and outlet (top) that correspond to the pressure are their relative altitudes....

22 February 2021 9,972 4 View

How do I add a udf to Ansys fluent and does it need to be compiled before hand ?

I have a Define_CG_Motion udf written in c where do I add it to my Ansys fluent project and does it need to be compiled before that?

21 February 2021 9,347 3 View

How do I plot Pressure against crank angle degree in Fluent?

18 February 2021 8,390 3 View