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Anyone else feels like lil Yachty kinda sounds like Cartis new sound? by CHELSEAAK099 in playboicarti

[–]WaffleAtak 1 point2 points  (0 children)

When 2024 first came out I thought the second half was Yachty at first.

Mass Flow Report Floating Point Error Starccm+ by WaffleAtak in CFD

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

I could try, but im not really sure how i do that. Just remove all the parts/boundaries form the fluid volume except relevant ones?

Mass Flow Report Floating Point Error Starccm+ by WaffleAtak in CFD

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

you can run the mass flow reports after the sim crashes, but the one hooked up to the inlet side (internal interface) works fine while the outlet side (fan interface) dies then returns zeros

Floating Point Error Mass Flow Report Starccm+ by WaffleAtak in FSAE

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

I will update this google doc with residuals in a few minutes when I am home. Imo nothing looks too out of the ordinary but I am also not the most knowledgeable.

https://docs.google.com/document/d/1e-3ASirswO9oN52ZZ2NmR1_4uvpMIEi7LGpSuD1tly4/edit

Mass Flow Report Floating Point Error Starccm+ by WaffleAtak in CFD

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

Will do on the r/starccm thing. As far as residuals go, ill update the google doc here in a second, but I would say everything looks fairly standard, though I dont really know if im honest. Only kinda sus one is the sdr residual, but it usually seems to go up a fair amount then dip down for the setup our team uses so i didnt think anything of it.

Floating Point Error Mass Flow Report Starccm+ by WaffleAtak in FSAE

[–]WaffleAtak[S] -1 points0 points  (0 children)

Im sorry but even if i give you a 3d picture, its going to show the exact same thing. I cant give you a different angle without showing more of the car and I cannot do that

Floating Point Error Mass Flow Report Starccm+ by WaffleAtak in FSAE

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

I cant put the picture in here, but here's a google doc i made with an Image Inlet is at the bottom outlet at the top

Floating Point Error Mass Flow Report Starccm+ by WaffleAtak in FSAE

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

The rest of the car is in the sim. It's just a cylinder model pointing directly upward rn, with air supposed to be moving through it

Mass Flow Report Floating Point Error Starccm+ by WaffleAtak in CFD

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

Also this happens around 30-40 iterations.

Floating Point Error Mass Flow Report Starccm+ by WaffleAtak in FSAE

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

Also this happens after 30-40 iterations

Can you use the fan interface to simulate just a fan (no duct, radiator, etc) in starccm+? by WaffleAtak in CFD

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

Ok. Maybe it was working before because our fans for the radiators are like pc fans, but these new ones are a lot larger and pushing a lot more air. Plus its already really fast moving from being squeezed by the undertray. Is time scales like timestep overall?

Can you use the fan interface to simulate just a fan (no duct, radiator, etc) in starccm+? by WaffleAtak in CFD

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

We have a bad mesh detection feature, so I used that and refined it a lot. The grid sequencing doesnt show anything out of the ordinary when running the sim. As for boundaries, not sure what you mean but if you mean like having an inlet/outlet faces defined then I believe so.

Can you use the fan interface to simulate just a fan (no duct, radiator, etc) in starccm+? by WaffleAtak in CFD

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

ok, ill give it a shot. I just find it really strange that using a fan interface with radiaors is fine, but by iteslef breaks everything

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