- 70
- 29 174
Lethe CFD
Canada
เข้าร่วมเมื่อ 22 ก.พ. 2021
Channel dedicated to the open source CFD-DEM software Lethe (github.com/chaos-polymtl/lethe)
Particle discharge from a plate with DEM
Particle discharging from a plate using various computational performance enhancement methods with load balancing and adaptive sparse contacts with 3D DEM.
Example 🔗: Will come shortly
Simulations carried out using the Lethe open-source CFD software: chaos-polymtl.github.io/lethe/index.html
#dem #lethecfddem #chaospolymtl
Example 🔗: Will come shortly
Simulations carried out using the Lethe open-source CFD software: chaos-polymtl.github.io/lethe/index.html
#dem #lethecfddem #chaospolymtl
มุมมอง: 30
วีดีโอ
Loading of particles for pneumatic conveying case
มุมมอง 28914 วันที่ผ่านมา
Loading particles in a pipe with an initial shape of slug for pneumatic conveying simulation in unresolved CFD-DEM. Example 🔗: chaos-polymtl.github.io/lethe/documentation/examples/unresolved-cfd-dem/dense-pneumatic-conveying/dense-pneumatic-conveying.html Simulation carried out using Lethe: chaos-polymtl.github.io/lethe/index.html #dem #lethecfddem #chaospolymtl
Dense pneumatic conveying case
มุมมอง 21914 วันที่ผ่านมา
Small dense pneumatic conveying in unresolved CFD-DEM with periodic boundary conditions. Example 🔗: chaos-polymtl.github.io/lethe/documentation/examples/unresolved-cfd-dem/dense-pneumatic-conveying/dense-pneumatic-conveying.html Simulation carried out using Lethe: chaos-polymtl.github.io/lethe/index.html #cfd #dem #unresolvedcfddem #lethecfddem #chaospolymtl
3D Force chains visualization during a hopper discharge
มุมมอง 78621 วันที่ผ่านมา
Force chains visualization during a hopper discharge - Discrete Element Method (DEM) Simulation carried out using Lethe: chaos-polymtl.github.io/lethe/index.html #dem #lethecfddem #chaospolymtl
3D Rayleigh-Plateau Instability with an excitation amplitude of 0.30
มุมมอง 50หลายเดือนก่อน
Multiphase simulation of a 3D Rayleigh-Plateau instability with an excitation amplitude of 0.30 in absence of gravity using the Volume of Fluid (VOF) method. Example 🔗: chaos-polymtl.github.io/lethe/documentation/examples/multiphysics/rayleigh-plateau-instability/rayleigh-plateau-instability.html Simulation carried out using the Lethe open-source CFD software: chaos-polymtl.github.io/lethe/inde...
2D Rayleigh-Plateau Instability with an excitation amplitude of 0.60
มุมมอง 19หลายเดือนก่อน
Multiphase simulation of a 2D Rayleigh-Plateau instability with an excitation amplitude of 0.60 in absence of gravity using the Volume of Fluid (VOF) method. Example 🔗: chaos-polymtl.github.io/lethe/documentation/examples/multiphysics/rayleigh-plateau-instability/rayleigh-plateau-instability.html Simulation carried out using the Lethe open-source CFD software: chaos-polymtl.github.io/lethe/inde...
2D Rayleigh-Plateau Instability with an excitation amplitude of 0.20
มุมมอง 41หลายเดือนก่อน
Multiphase simulation of a 2D Rayleigh-Plateau instability with an excitation amplitude of 0.20 in absence of gravity using the Volume of Fluid (VOF) method. Example 🔗: chaos-polymtl.github.io/lethe/documentation/examples/multiphysics/rayleigh-plateau-instability/rayleigh-plateau-instability.html Simulation carried out using the Lethe open-source CFD software: chaos-polymtl.github.io/lethe/inde...
Unresolved CFD-DEM simulation of a 3D spouted-bed
มุมมอง 1632 หลายเดือนก่อน
Unresolved CFD-DEM simulation of a fully 3d spouted-bed reactor using the open-source CFD/DEM/CFD-DEM software Lethe chaos-polymtl.github.io/lethe/index.html #unresolvedcfddem #lethecfddem #chaospolymtl
Turbulent Taylor-Couette Flow (Re=4000)
มุมมอง 2483 หลายเดือนก่อน
Simulation of the start of a Taylor-Couette instability at a Reynolds number of 4000. Simulated with the open-source software Lethe: chaos-polymtl.github.io/lethe/index.html #cfd #lethecfddem #chaospolymtl
Simulation of hopper discharge
มุมมอง 4244 หลายเดือนก่อน
Discrete Element Method (DEM) simulation of the discharge of a hopper carried out using the open-source Lethe software: chaos-polymtl.github.io/lethe/index.html #dem #lethecfddem #chaospolymtl
DEM simulation of powder spreading in laser powder bed fusion (LPBF) 3d printing - Size
มุมมอง 3.4K4 หลายเดือนก่อน
DEM simulation of powder spreading in laser powder bed fusion (LPBF) 3d printing - Size
DEM simulation of powder spreading in laser powder bed fusion (LPBF) 3d printing - Velocity
มุมมอง 2.1K4 หลายเดือนก่อน
DEM simulation of powder spreading in laser powder bed fusion (LPBF) 3d printing - Velocity
Taylor-Green Vortex - Velocity Contours
มุมมอง 7254 หลายเดือนก่อน
Taylor-Green Vortex - Velocity Contours
Liquid-solid fluidized beds at different regimes
มุมมอง 31410 หลายเดือนก่อน
Liquid-solid fluidized beds at different regimes
Unresolved CFD-DEM simulation vs. experiment - Liquid-solid fluidized bed
มุมมอง 37910 หลายเดือนก่อน
Unresolved CFD-DEM simulation vs. experiment - Liquid-solid fluidized bed
Sedimentation of 64 particles using resolved CFD-DEM
มุมมอง 472ปีที่แล้ว
Sedimentation of 64 particles using resolved CFD-DEM
Dam-break with an obstacle - Lethe example
มุมมอง 372ปีที่แล้ว
Dam-break with an obstacle - Lethe example
Volume of Fluid (VOF) simulation of Rayleigh-Taylor instability with mesh adaptation
มุมมอง 84ปีที่แล้ว
Volume of Fluid (VOF) simulation of Rayleigh-Taylor instability with mesh adaptation
Boycott Effect in Particle Sedimentation Simulation Using Unresolved CFD-DEM
มุมมอง 314ปีที่แล้ว
Boycott Effect in Particle Sedimentation Simulation Using Unresolved CFD-DEM
Gas Spouted Bed Simulation Using Lethe CFD-DEM
มุมมอง 736ปีที่แล้ว
Gas Spouted Bed Simulation Using Lethe CFD-DEM
So nice!
Cool!
What a nice simulation. Could you tell me what equation did you use to calculate the Reynold number ?
surprised this is the solution they settled on
Nice....how fast is Lethe DEM ..is there study available to compare it with other DEM codes? Thank you
The performance is increasing every day as we are always continuously improving the software itself. It is hard to assess if it is much faster or slower than other code as this really depends on the simulation set-up.
@@lethecfd6431 I will definitely try this code for compression simulations. I am looking for a computationally efficient DEM code that can handle at least 40,000 particles. LIGGGHTS is another option, but it takes a lot of computational time. :)
@@lethecfd6431 I will definitely try this code for compression simulations. I am looking for a computationally efficient DEM code that can handle at least 10,000 particles. LIGGGHTS is another option, but it takes a lot of computational time
Nice.* How* fast is Lethe DEM?* Is* there a* study avaliable (...)?
And what can you learn from such a simulation what is not obvious. If I have had to sketch the particle flow, this is exactly how I would've sketched it. Some ultrasonic compaction modelled?
satisfying lol
son?
Great video, but I have a few questions as an academic peer: What is DEM? What is laser powder? Why is it fusing with my bed? Why hasn't my dad returned from the store? I eagerly await your response and next entry in this series!
as another academic peer, i cannot answer the first 3 questions but the 4th i may have some insight. it is but a theory, but perhaps like the universe beyond the observational limits, the store to which he is approaching is receding from him at the same or greater speed. Therefore i regret to inform you that you father is trapped chasing the store forever, he misses you.
1. Discrete Element Model - it's a method of simulation idk I just googled it 2. Powder that the laser shoots and melts 3. It's not fusing with the bed, It's fusing all the little bits of metal powder together to form a shape from the metal, like a metal casting but one tiny grain sized layer at a time... WITH FRIKKIN LASERS!!! 4. milk exploded in a freak store related accident and killed him instantly
Can we measure the particle temperature in this simulation
Very interesting! 🙂
Could you maybe make one where the particles are colored based on where they started? It would be really interesting to see if there's some "fixed points" or places where the particles didn't get mixed much.
Looks like there's a large body of particles that basically doesn't move at all going through the entire middle of this
Yea I found that interesting. It doesn't appear to mix as much as I would think
I feel happy watching this
cement mixer goes brrr
TH-cams compression algorithm does NOT like this video
Looks like an exponential increase
It looks great! Congratulations! Is there any repo where I may find the source code of this example? Thanks!
Not right now, but if you ask on the discussion thread of Lethe, we can make the prm file available online publicly. github.com/lethe-cfd/lethe/discussions
@@lethecfd6431 It sounds great! Thank you so much!
Congratulations! Great job! Is it possible to simulate the case of a flow in a cylindrical duct with periodic boundary conditions and particle transport (with double coupling: fluid-particle and particle-fluid)? Thanks in advance!
At the moment periodic boundary conditions are not fully supported, but they will be in the coming months so stay tuned :)!
@@lethecfd6431 Hi! Thanks for your message! I'll stay tuned, for sure!
It looks intriguing! What is the CFD tool?
CFD, DEM, and coupling solvers are inside the open-source Lethe package. Lethe consists of high-order finite-element CFD solvers; it is fully parallel with load-balancing. You can find more information about Lethe and the installation guide on: github.com/lethe-cfd/lethe
@@lethecfd6431 Thank you so much.