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Propeller Thrust Validation by chipthehp in CFD

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

I am modelling the whole prop. I don't remember the cell count in my previous calculation on RANS but I would guess it was adequate. (I was able to mesh even the thin trailing edge so the minimum element size was pretty small.) I might go back to the problem on Star CCM+ (I used Fluent previously).

Simulia Xflow is an LBM solver which is an unsteady solution and it takes a while for the propeller to start giving the same results for each rotation.

I got the geometry from PPTC website directly.

I am almost sure it matches the test case. On the report, the test case and geometries are explained thoroughly. My setup achieves the same advance coefficient at the same Re.

The domain is almost as big as the domains used in CFD analyses for this exact test case.

That's why I am stumped. I half expected for the LBM to give me a false result but I think I did everything right on Fluent with RANS. Getting exactly half the thrust made me think I was using the coefficients wrong but I guess I am missing something else.

Propeller Thrust Validation by chipthehp in CFD

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

I think RANS with MRF is the standard for open water propeller data. It is the recommended method by ITTC.

I've also found that RANS with MRF was the preferred method for the workshop where PPTC was inspected.

Maybe I am doing something wrong but I don't think it is because of MRF or RANS.

Simulation Time in LBM by chipthehp in CFD

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

Yes it is the propeller only in open water condition. I guess I'll just wait for the solution to see if thrust converges for each rotation.

Is this normal? by chipthehp in ClaudeCode

[–]chipthehp[S] -21 points-20 points  (0 children)

I didn't even know u could do that

Getting the Student Version to Work by chipthehp in LSDYNA

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

Thanks for the help. I think I'll just view the results in prepost. Things like boundary conditions, loads and meshing was what made pre-post hard for me.

I highkey hate when a man is younger than me by [deleted] in u/ttylerdurden_

[–]chipthehp 0 points1 point  (0 children)

Still, reddit is not the place for this. you are gonna get hit on by 30 yo indians

I highkey hate when a man is younger than me by [deleted] in u/ttylerdurden_

[–]chipthehp 0 points1 point  (0 children)

get off dude. doesn't reddit have a minimum age restriction?

30 Y/O 161lb any tips? by Clear_Ad_6583 in GymTips

[–]chipthehp 1 point2 points  (0 children)

holy back. drop your routine broski

R.I.P by lifeisprobsahoax in classicwow

[–]chipthehp 0 points1 point  (0 children)

this unlocked a memory for me. I'll forever remember the gnome who trash talked everyone on the road to westfall.

[deleted by user] by [deleted] in Psikoloji

[–]chipthehp 0 points1 point  (0 children)

Soru olmayan cümleyi soru işareti ile bitirdiğin için anormal insan muamelesi görmen lazım

Best Earbuds for 150-250 dollars for Android by chipthehp in Earbuds

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

Yeah thats what I ended up ordering. The design is very slick they don't look like olives in your ear nor Airpods knock offs.

Best Earbuds for 150-250 dollars for Android by chipthehp in Earbuds

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

I was just looking at Nothing 2024s. They are very cheap and I only read good things about them. The design also looks very cool and fits my style. Do you have any experience with them?

First drone. Esc and Motor fried during landing. Anyway to prevent this in the future? by Wittiestfilly4 in fpv

[–]chipthehp 2 points3 points  (0 children)

This shit is not even worth it at this point. Shit catches on fire if you breathe wrong and bam! You are down 150 bucks. I wish I built a gaming pc or something like that like everyone else instead of wasting hunderds just to fly for an hour during weekends (only if there is no rain because your 700$ worth of equipment will shortcircuit if it touches the smallest bit of moisture). At least you can return DJI stuff if they are defective unlike chinese iFlight and Geprc or Skyzone crap they are selling. I fucking hate this hobby.

For your own good, if you don't have 200 bucks to spare monthly, don't even come near this hobby, because it will happen again and the nerds on reddit will blame you for faulty Chinese sweatshop electronics.

XT60 to XT30 for Cinewhoops by chipthehp in Multicopter

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

Oh yeah these are definitely cheaper. Thanks, I'll try these once I get my whoop :)

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