Best Of
Re: How to get Mean Velocity Contours in Ansys Fluent?
No, just that you'd need to do data sampling. Steady state is the equilibrium case, so, in theory all the results are averaged (look up what RANS means).
Rob
Re: Thermo-Mechanical Fatigue lifing ACT
The A,m & n are material specific. These are the temperature dependent parameters used in the damage equation. The model in slide deck was kept for demonstration. User is expected to find the values of A,m & n based on material and type of fatigue being evaluated.
kumarkartikeya
Re: Single particle motion in flow in a pipe
Read up on the DPM maths as that'll explain what's going on, and why nothing visibly changes in the flow field.
MPM is an older model and may be lacking some of the additional UDF hooks to add to the momentum. Check what you need to do as you may find you can add momentum another way: gravity doesn't have to be constant or "down" in a CFD model! All I can say on the model is read the documentation: I've seen it used but never tried to switch it on.
The most comprehensive method is probably 6DOF moving mesh with some additional UDFs to account for contact with the pipe walls. There are some examples in the UDF documentation and videos in the general help.
Rob
Re: File journal data sampling for time statistics
Better to let Fluent record the journal: it will keep track of all commands you are executing in Fluent from the console using the right format!
DrAmine
Re: Merhaba ben ansys ögrencı surumunu kullanıyorum mechanical bolumune gecerken sureklı hata verıyoir
@Arzu Can you try renaming your %APPDATA%\Ansys\vXXX directory to vXXX.old, where vXXX is the version you are trying to run? If that fails, please open a command prompt and enter "set" without the quotes and send the entire output.
Thanks
Matt
mmadore
Re: what is mesh orientation in solar model
This screen snapshot is from the ANSYS Help. North is +Y and East is +X that means up is +Z.
If you use those values, then in CAD, draw your solar still so the X-Y plane is ground and Z is up. Draw the glass facing toward -Y and that is South.
If you already drew your solar still and the X-Z plane was ground and Y is up, then if your glass was facing the -Z direction the values in the Mesh orientation would be
peteroznewman
Re: Drilling operation and Thrust force calculation in ANSYS explicit dynamics
I opened your ANSYS 19.2 model. I see you have a velocity to plunge this tool into the workpiece, but you don't have anything to keep the tool rotating after it makes contact.
Yes, you have an Initial Condition of Angular Velocity, but that is only present at T=0. As soon as the tool makes contact with the workpiece, contact forces will act on that tiny mass, and the rotation will stop very quickly. I must not be a very good teacher if you have not learned that lesson after all the discussion on the single point turning model.
peteroznewman
Re: Gradual sedimentation of particles in a uniform suspension under gravity, Euler-Euler or DDPM ?
1/I have supervised solid suspensions and sedimentation works in closed vessel. Even with steady state solver. At certain loading transient solver is necessary.
2/I will prefer using Euler Granular Model here. Some tuning might be required to have particles settling down and not moving anymore. At certain stage a packed bed approach needs to be used
3/DDPM with DEM might be expensive but serves the same purpose.
4/If the particles are of small sizes why not using a completely different apporach: UDS. We used that to model sedimentation processes in clarifier. At that small scale some other forces rather than drag become prominent.
DrAmine
Re: Defining line in CFD-Post with input parameters
Define it as interior boundary to have it always there.
DrAmine
Re: Alternative for Random Vibration for nonlinear contact?
Yes, you can use Transient Structural to simulate the time-history of a structure subjected to transient loads.
The reason there are linear tools such a Random Vibration analysis is that they are very fast at giving useful information. By very fast, I mean that you might need to spend a factor of 100 in extra time and effort to obtain similar information from a Transient Structural analysis that you get from a Random Vibration analysis.
I recommend you perform a two linear analyses on your structure to evaluate two extremes: Bonded Contact and No Contact. There is a linear contact called No Separation that allows sliding, which is in between those two extremes. Run those two (or three) Random Vibration analyses to see how much the results change with contact status (bonded or not). If the difference is small, you can save yourself a lot of time and effort building a Transient Structural model. If the difference is large, at least you know that the effort is worthwhile.
peteroznewman