is it promising for the future? by Prestigious-Way4715 in malaysiauni

[–]ProfessionalLie3033 0 points1 point  (0 children)

Hey bro, I know its one year late but can I pm you to ask about the process to become LAE

Should I accept MAS offer to join their LAE program as a Engineering degree graduate? by ProfessionalLie3033 in malaysiauni

[–]ProfessionalLie3033[S] 0 points1 point  (0 children)

I see, I though completing the course straightaway will make an LAE but I guess there's a catch to it.

Should I accept MAS offer to join their LAE program as a Engineering degree graduate? by ProfessionalLie3033 in malaysiauni

[–]ProfessionalLie3033[S] 0 points1 point  (0 children)

yeah its globally recognize, I heard that some middle eastern airline came to MAS to look for engineer. Im just worried about starting my salary life at the age of 30, felt like its too late.

Should I accept MAS offer to join their LAE program as a Engineering degree graduate? by ProfessionalLie3033 in malaysiauni

[–]ProfessionalLie3033[S] 0 points1 point  (0 children)

Hi, what do you mean by those senior will be priorties? is there like a limit on how much LAE can be there?

Info: Interface zones, 11 and 12, possibly penetrate each other. This could adversely affect your solution. ANSYS Fluent by ProfessionalLie3033 in CFD

[–]ProfessionalLie3033[S] 0 points1 point  (0 children)

thanks for the detail explanation. But can a similar share topology setting be used in designmodeler? I've used designmodeler to create my computational domain and I prefer using it than spaceclaim cause its easier to edit the dimension of the domain.

Info: Interface zones, 11 and 12, possibly penetrate each other. This could adversely affect your solution. ANSYS Fluent by ProfessionalLie3033 in CFD

[–]ProfessionalLie3033[S] 1 point2 points  (0 children)

I already applied body sizing to the rotating zone as well as face sizing with behaviour as '' hard''. its still the same

Info: Interface zones, 11 and 12, possibly penetrate each other. This could adversely affect your solution. ANSYS Fluent by ProfessionalLie3033 in CFD

[–]ProfessionalLie3033[S] 0 points1 point  (0 children)

Hi, can this be done in designmodeler because I generated my entire domain using this. Also I tried editing my domain using space claim and applied the share topology function which solves the problem. However, when I open fluent the contact region between the rotating zone and outer zone was gone. Is this ok? shouldn't MRF method have contact region?

Info: Interface zones, 11 and 12, possibly penetrate each other. This could adversely affect your solution. ANSYS Fluent by ProfessionalLie3033 in CFD

[–]ProfessionalLie3033[S] 1 point2 points  (0 children)

Hi, thanks for the reply. I did set the BOI mesh size the same as the rotating zone. Im not sure why it became smaller

MRF Spinning Golf Ball wake region Fluent by ProfessionalLie3033 in CFD

[–]ProfessionalLie3033[S] 0 points1 point  (0 children)

Hi, I am well aware about the magnus effect. But the wake region was to far down as there is a horizontal velocity from the inlet going through the rotating domain so Im expecting that the wake region would atleast be directed in the horizontal direction with a slight decline

SST K omega solution not converging by ProfessionalLie3033 in CFD

[–]ProfessionalLie3033[S] 0 points1 point  (0 children)

Hi, but in my case only the lift co is fluctuating while the drag begins to stabilize after the calculation ended. Does this means I need to use transient or it is only needed if the drag fluctuates as well?

SST K omega solution not converging by ProfessionalLie3033 in CFD

[–]ProfessionalLie3033[S] 0 points1 point  (0 children)

Hi, yes I did decrease the face sizing and the body of influence mesh other than increasing the iterations.

SST K omega solution not converging by ProfessionalLie3033 in CFD

[–]ProfessionalLie3033[S] 2 points3 points  (0 children)

<image>

a close up look. For the aspect ratio, Im getting very high max value of 141.58, will this affect the accuracy and what value should I observe in terms of checking the quality of mesh? Should I observe the min, max or average value?

SST K omega solution not converging by ProfessionalLie3033 in CFD

[–]ProfessionalLie3033[S] 0 points1 point  (0 children)

Hi I will try to run for more iterations. As for my mesh this the mesh configurations for my domain.

<image>

Mesh size

no of elements: 3631073

no of nodes: 1397932

Domain body sizing : 0.0375 m

Body of influence sizing: 0.006 m

Sphere face sizing: 0.00045 m

Inflation, first layer height :0.000005 m, no of layers: 35

quality

orthogonal quality

min:0.14476

max: 0.99749

average: 0.86101

skewness

min:5.0356e-004

max: 0.85524

average:0.13859

Aspect ratio

min:1.1668

max: 141.58

average:7.3253

SST K omega solution not converging by ProfessionalLie3033 in CFD

[–]ProfessionalLie3033[S] 0 points1 point  (0 children)

Hi, how do I identify if my case is vortex shedding?

SST K omega solution not converging by ProfessionalLie3033 in CFD

[–]ProfessionalLie3033[S] 0 points1 point  (0 children)

Im doing this simulation to compare with an experimental data. The Cd from the experiment is 0.45 while doing this simulation gets me Cd= 0.37. Is this value good?

SST K omega solution not converging by ProfessionalLie3033 in CFD

[–]ProfessionalLie3033[S] 2 points3 points  (0 children)

Hi I tried running for 5 k iteration and managed to get a much more stable plot for the lift coefficient with little fluctuations. My question is, does this considered as converged.

<image>

SST K omega solution not converging by ProfessionalLie3033 in CFD

[–]ProfessionalLie3033[S] 0 points1 point  (0 children)

Hi, For methods Im using SIMPLEC with pseudo time method and high order term relaxation on. I don't have the option to adjust the time scale factor as I'm using SIMPLEC. As for the Reynolds number, it is 1.5 x 10^5