33:20 I made it to this point. For this presentation to make the Lattice Bolzman method understandable, it needs to spend some more time on this concept of phase space. Instead this presentation suddenly made a deep-dive into hardcore math saying "I will not explain about this in detail because it is very complex".... ok... First part was good but here I stopped watching
@JeffreyMiller-h3pКүн бұрын
Kyler Flats
@nicolasmaquignon88102 жыл бұрын
Very nice to know about the physics behind the equations !
@maxmustermann3938 Жыл бұрын
It seems to me that this discretization directly ties the timestep to the spatial resolution since a single time-step would have to exactly match up such that the neighboring node is reached with the given discrete speed vector. Am I correct in this assumption? This is really the main thing that has been confusing me about LBM since many papers and texts seem to treat both of these as variables and don't even mention this, although I have found some that do exactly what I describe. Is there a way to do substeps in time with this method? Or is there simply no need, numerically speaking, i.e. is this exact matchup between spatial resolution and timestep simply also the numerically most accurate way to do it?
@ehsanyounesi37572 жыл бұрын
that was a brilliant presentation, thank you, it brighten the path. I also have a question, what application do you suggest for coding LBM ?? python or Matlab or any other one?
@Feaforall2 жыл бұрын
C++ or C To code a solver you need speed
@Feaforall2 жыл бұрын
If you just want to code for fun, then you can use any code, but using python for example will lead to very slow calculations
@sedeheless7 ай бұрын
Hi, I try to ask 2 questions here, don't worry if you can't answer it :) I'm strugling to code a LBM simulation and I always get some strange ripples (region where f becomes alternatively big and small in the direction of propagation). It seems that the method doesn't like big f gradient : they get bigger and bigger (with any tau value). I suspect that I'm not doing the operations in the right order : I'm doing every node's advection (parallel calculations on GHPU), THEN every collision. I see at 42:03 that it's not the way you recommand it, but I don't really understand your description... This iterative method will change a node after the other. So the one I just change will then be read with it's new value for the next one ? I'm confused. How could this be parallelized ? Also, what is the 4th step: "Post-collision rearrangment" ?? Sorry for my approximative english and of course, thanks for this nice video :D
@fujatv503 Жыл бұрын
This is a very good video to get into the lattice boltzmann method. Thank you!!! Please never take this video offline! :D
@mattiaviola71522 жыл бұрын
Thanks, it is really clear and interesting 👍
@markneumann3814 ай бұрын
Thanks so much. Great job. Enjoyed your lecture.
@ikhsanmnoor85894 ай бұрын
Complex yet, explain quite interesting ❤
@the24thintrovert Жыл бұрын
am i supposed to mesh my geometry while using LBM ?? Kindly reply
@andrewpurkis10492 жыл бұрын
Thankyou for uploading this video. I found it very interesting.
@parshvaparekh622 жыл бұрын
Can you please make a video on Turbulent plane channel flow with smooth walls using OpenFOAM?
@j.aguilar58493 ай бұрын
Great stuff dude, keep it up!
@rolandotillit2867 Жыл бұрын
Does LBM treat the particles as elastic or rigid?
@empireempire35452 жыл бұрын
What is the exact form of f(x,ei,t) and feq(x,ei,t)?
@commonwombat-h6r2 жыл бұрын
thank you for good presentation!
@cam46092 жыл бұрын
I'm always watching it well. Thank you. Please share it with us more.
@AJ-et3vf2 жыл бұрын
awesome video! Thank you!
@josephpareti9156 Жыл бұрын
great presentation: it helped me make sense of LBM. My focus is a deep learning model based on LBM (Bedrunka et al) and I would like to recommend the 2