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@@Amod2050 thank you. Verbosity just confuses pepple

@@sibonisozakwe3805 have you tried changing to surface select? Sometimes edge select is on my default.

@@danieltueros4025 take a look at the turbine video on this channel. That shows a method.

@@congatinh4261 I don’t remember, but I assume only a few minutes with that mesh resolution.

@@jaforikbal6388 hi, I’m not sure. You’ll have to set those fluid properties at the inlet.

Hello, Thank you. Glad it helped. It’s hard to say without seeing the case. Have you tried clearing the results and rerunning?

@@ClimateCFD yes, i cleared it but the torque still the same. is it possible to send the image of the case? thank you very much.

@@naufalriyandi7228 sure, climatecfd@gmail Com

Make sure the expression is used to set the inlet velocity/angular velocity.

Check your license

If that fails, clear the solution and retry.

You’re welcome!

Hi GPT Joe, The parameters we chosen because the formed a sinusoidal gust, but by squaring the sine term it prevented the lateral velocity term from going negative. There are better gust models, that produce a more physical natural wind approximation, however this one was chosen because of ease of implementation. I would not trust the accuracy of the results because of the reasons stated in the video.

@@ClimateCFD who is GPT Joe?

@@ShropVentures this annoying guy I know.

Drop me an email at climatecfd@gmail.com

@@ClimateCFD OK sir, thank you. I will send it soon

Two different solvers. CFX originally from a different company. Apparently it is more robust. Now they’re basically the same.

Thank you 🙏

@@ClimateCFD You're welcome. I have a question about Fluent PP. Using Reports - Flows - Total Heat Transfer Rate, the user receives an output that breaks down thermal performance by domain component. How is the thermal power calculated under the inlet boundary condition? Thank you.

@@AR-yj4ft it’s been a while since I have seen this so will have to double check. However thermal power is usually Q_dot = m_dot * Cp * (T2 - T1)

@@ClimateCFD allow me to explain in-depth the energy balance in a domain if you don't mind. Energy flux through a non-wall boundary like inlet / outlet is the enthalpy, calculated as Cp * T(inlet). Typically, Fluent reports the enthalpy on non-boundaries as specific enthalpy (J/kg) weighted by flow rate (kg/s) -> (J/s) -> (W). Whereas the energy fluxes reported through wall boundaries are different. They are Q = HTC * Surface area * (Tenv - Tfluid), where the HTC has to be clearly defined. Fluent reports integral of Wall Fluxes -> Total Surface Heat Flux (W). Thank you for exciting discussion!

No, but I can make one. What are you trying to achieve?

@@ClimateCFD That would be really helpful if you could do one in Fluent. Unfortunately, there is no tutorial available for WDR using Fluent. Overall, I am trying to find the wet catch ratio.

Equation for the power law is here ☝️

Create a variable and set as input parameter.

Depends where you are getting your CAD from. STL is a surface file so will have come from some CAD software.

From the above method, yes.

I’m so happy to be back! Also, I love your rebrand. I’ve been following you since you were @JB. WRT your question: this is a model and our BCs are representative of those of a wind tunnel. We assume time-averted flow behaviour so we miss out on the instantaneous physics. Also, the mesh is extremely coarse and omits prism layers for wall-normal gradient capture.

@@ClimateCFD It was @jb_42 but thank you And thank you for providing insights into the simulation model, and I appreciate your explanation regarding the representation of wind tunnel boundary conditions and the considerations made for time-averaged flow behavior. Your clarification on the mesh resolution choices is also valuable. I now have a clearer understanding of the trade-offs involved in the simulation approach. I look forward to further exploring these concepts. Thank you for your time and expertise For a future video could you possibly cover multiphase flow modeling? Ta bab

@@ShropVentures would love to, pet.

​@@ClimateCFDhey brother, Please make a tutorial on turbulent flow in a circular pipe with constant diameter in ansys fluent. How to mesh it with the inflation layer as well.

@@user-wr9bf7sz2d yeah, sure. Think there’s already one on the channel, but that might be CFX.

Hello, what do you mean by 'domain expansion'?

Glad it helped!

did you able to do it? im also facing the same problem.

Split the surface along the chord line when you create the geometry.

did u find out

The same as what, sorry?

@@ClimateCFD every value of torque regardless of the RPM turns out to be same after we give calculate. Tried for various geomtry, flow conditions and all. Did exactly same as what you did, stll all the torque values during the parametric study is the same.

Not 100% sure what you mean. It was a basic volume of fluid simulation in Ansys CFX. Let me know if you need to know anything else.

You’re welcome. What case are you running?

I hope you found the issue. Normally means there would be faces that aren’t limited by edges. Difficult to say without looking at the CAD.

GrabCad

Hello, sorry this is incredibly late...but for others reading: Yes, that should be very achievable by using the area average function in expressions and then changing it into a variable.

This is just a function of the optimisation algorithm. It won’t always guess correctly, but it will move towards a minima after some ‘investigation’ of the effect of parameters on the quantity in question.

Thanks, that's very kind.

Yes, no reason why not.

Just to ensure the turbine rotates the correct way.

Just to ensure the turbine rotates the correct way.

@@ClimateCFD thanks for the reply! I've another query. In the inlet you select mass flow rate , but if i want to select air velocity that possible? Should i select cartesian velocity and apply the velocity in the Z direction?

@@codexn5716 you can either select normal to the inlet of the vector for flow direction….which I think is a in this case.

Hi Tala, Firstly thanks. Glad it helped. Shouldn’t be to do with mass flow. It’s likely to be a result of the rotating domain setting omega.

Look at area average pressure at outlet - inlet.

@@ClimateCFD thank you

That's going to require a proces called 'mapping'. I only have experience doing that in OpenFOAM.

They can be exported to CSV using the export function in chart viewer. From there the CSV can be converted to Excel.

You're very welcome. Glad it was helpful.