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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

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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？

what is the mesh configuration of this? and what does the performance curve looks like? I did the same thing in the past but did not get the same performance as the experimental unit? just wondering if yours anygood?

Why would a system that starts symmetrical not end symmetrical?

Where can I buy this valve for project demonstration.

How to make the demo project model of this scfb..

Hello! Can you please attach the details of this simulation? or share the OpenFOAM code used to make this simulation?

The animation in the middle is wrong. It's a P trap connected as a S trap.

In the middle example, now when the air bubble gets big enough does this area directly lower the pressure? Also if there where another fluid path before the bubble could you lose flow completely?

and it me here tryna find mystery of air pockets under waterfalls

If the house had s traps when it was built (and a long time ago they were quite legal), then you are allowed to replace a bad s trap with a good s trap (as a repair), I have never heard of an inspector requiring more than that. That being said,..I've worked on a few houses that old (some of them have lead plumbing pipes up to 2 inches, but usually 1 1/4 to 1 1/2). My experience has been that a full kitchen sink with an s trap drain,.. can and will sometimes suck an s trap dry. I don't recall a vanity sink ever doing that. It is very easy to put an air admittance valve to deal with an s trap,..you can run a drain pipe through the roof at some point in the future,..when and if you do a complete remodel,..removing sheetrock and all.

hi can i know what is the bottom outflow boundry condition? ichoose inletoutlet but it doesnt work