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This is interesting!

Will air entrainment reduce capacity of downstream pipe? And how to address it in design?

What's happening here, what is the difference, can someone explain?

Eddy - can you share more info on the setup? Pretty impressive resolution using only K-ep, looks more like LES… you sure you didn’t accidentally post the LES sim (per your comment) up top? 😅

Really nice simulation. Flow3D not the best tool for this scenario?

Awesome

what happened if mixing ‘S-trap’ and ‘P-trap with air vent’?

Can you give your Email id

Wow. I wonder if this is why my basement kitchen sink and bathroom sink weren’t fully sealed although the p traps were correct. They are close to a very strong waste ejector pump. I was thinking about installing aav on both sinks to provide a better seal. What do you think?

At what flow rate is this design?

Hey Eddy Lau, I would like to get access to some of your models. I’m currently working on flooding hazard for bridges structures and I need to get used with OpenFoam modeling. I’ll appreciate it if you can help me.

It would be great for beginners like me if you would post the tutorial as well . Looking forward to it .

Hi, Thanks for sharing your result. Is it possible to share the dimension and properties of your used geometry?

Hydro Int. Hydro-Brake, ACO Q-Break, StormBreak, SDS Vortex Flow... There are so many products in this space right now.

Very nice. Do you have a tutorial anywhere?

good video ruclips.net/video/GW3XpOh25wg/видео.html

Nice video! Would you like to share this case？pls

how do you simulate like the flow??? I only know how to do animations for contours on like planes :(

To my eye RNGkEpsilon looks best.

The 2nd and 4th one look realistic if the stream was causing the turbulence but the 1st one is the most realistic for pre-turbulent fluid.

Hi thank you for this video…i have simulated the same in Flow 3D and its successfully running… I am trying the same with STARCCM+ but with multiphase model activated the solutions are diverging. Can you help me in solving this in STAR CCM+

What software do u use? Ansys?

It is so strange to have a so much difference between two RANS models. I never see this before

And which Is more accurate?

Hello, Eddy! Could you tell what multiphase and turbulent models did you used to simulate that regime with hydraulic jump on air-water interface?

Hello, amazing job Mr. Eddy!! I'm sorry but I have a question, how did you define the BCs and what solver did you use?... a while ago I tried to simulate it with dynamicMesh, interFoam, turbulenceModel was laminar. What did I do wrong? Thanks in advance.

Great vid

That's gonna get filled with sand within an hour.

มีคลิปสอนกำหนด inlet outlet มั้ยครับ

Please upload tutorial for this

Hi Eddy, can you do consultancy work for us?

Excellent job, you are awesome. Please could you help with your downstream boundaries conditions for each scenario? Regards

It’s an s-trap if you aren’t connected to the vertical vent within 5 ft. So two s-traps and a p-teap

How to permanently solve daily air lock problem in a 7 storey apartment

Interesting Animation! 🙂

thanks for the upload. This is great. I'm an openFoam enthusiast. I believe the solver is interFoam?

There is a 40k subscribers CC from Bilibili called Scott_CFD stoled your video without even giving you credit

Could you explain plz

What program did you use to draw your geometry for Openfoam simulation? I started to use Openfoam and I only use Salome for drawing geometry but it isn't friendly :') I like your simulations

Hi. I'm interested to know on how you perform the simulation. Mind to share with me on how you do that. Thanks.

How do You implement Manning's value into OpenFoam?

velocity increases from left to right but decreases when it flows in the other direction :0

which one is the most realistic?

Hi Eddy. Keep posting FLOW -3D videos. You're cool

Hi, I need help to use flow 3d, can i get your contact or email pls? Thanks

What is the difference in terms of simulation time?

I wouldn't expect such a big difference.

"Numerical method (aka simulation) is cool and makes job easier but it cannot be used by random people. Using numerical method only is not enough. If you do that, foreign research teams will laugh at you. An engineer must prove that their numerical method is right or reasonable" - my numerical method lecturer

Here, in Belo Horizonte - Brasil, we have this excetly situation hapenning in a urban channel called Ribeirão Arrudas (Arrudas Creek). The canal beems use to make this effect in the water and we always have flood in this area. ruclips.net/video/BjVdSb1wNe4/видео.html ruclips.net/video/zuPgLXFEWLY/видео.html

It is a nice simulation! Can I ask a question about the pressure around the weir? Will the pressure of the flow(may be waterfall?) around weir become negative？