What kind of Computational fluid dynamics numerical simulations are used for Astrophysics?

Hello Friends,

I am trying to simulate a 3D LPT blade using hybrid meshing in fluent. I made the mesh by merging two meshes in ICEM. The mesh around the blade is made using blocking and other is tetra mesh. Then i merged it at a common interface.

When i set all the boundary conditions and try to initialize the case it shows

Is this becoz of mesh or some scheme. I am using transition model k-kl-w.

Dear all ,

i want to detect vortex and their propagation through a pipe and other complex geometries , i am using Fluent to simulate and there is a lot of parameter that can be used in Fluent or CFD-post ...

which is the better parameter to be used and how to manage the range to be displayed in order to detect the bigger vortex without showing the small vortex structure !!!!

Best

While setting boundary conditions for a pressure inlet (using ANSYS Fluent) values for Total Gauge Pressure and Supersonic/Initial Gauge Pressure required.

Although Ansys clearly defines Gauge, Static, Dynamic and Total Pressure, concepts like Total Gauge Pressure and Supersonic/Initial Gauge Pressure seem a bit confusing.

1) What is the difference between those values and what is their physical meaning? 

2) How do we relate those concepts with the concept of Operating Pressure and could they be interchangeable? For example, setting Operating Pressure to be 0 and adding a Gauge Pressure equal to the Operating Pressure (atmospheric pressure). What would it change? 

The artery geometry has an irregular shape where there is possibility of transitioning from laminar to turbulent for most cases in the stenoid(narrow) region , but for some of arteries flow remains laminar. What happens if I use KEpsilon for modeling all my 50 patients?

Can you suggest any book which gives a simple picture behind the formation of this wave?

I am working on Shock wave boundary layer interaction in hypersonic intake. So, could anybody suggest me some methodology that I can use to simulate the same in ANSYS Fluent or any other CFD analysis tool?

hello team members,

I am simulating a problem having leakage of hydrogen with known value of mass flow rate and inlet of fresh air. The hydrogen is mixing with incoming air from door. I have chosen pressure inlet boundary type in fluent for the entry of air with these values(fig 1, 2, 3). During post processing, finding the velocity vectors at the air inlet zone, some velocity vectors are showing towards outward (fig 4). Why this is happening? Please guide me in this problem.

I am interested in solving the dimensionless equations for a bubble motion in COMSOL Multiphysics. But do not how to enter the dimensionless equations for density, viscosity, Reynolds number, Weber number, and Froud number as given in the attached papers. Can anyone please help in this problem. I shall be very thankful.

I have submitted my paper to one of the springer journal. For the first week of submission, the status was "with editor" and then it changed to under review for one week, then reviewers asigned for the next two days then again changed to under review for 10 days then finally to "required reviews completed". The status reviews completed was for one week and then it changed to with editor again for last 10 days. Now my question is if it is rejection then the editor would immediately send the rejection letter. Why the editor is taking time to decide? Is it a good sign or a bad one??