- Видео 10
- Просмотров 32 084
David Penner
Добавлен 8 июн 2013
Видео
Ahmed Body LES - Instantaneous vs Mean CpT
Просмотров 8102 года назад
Adjoint/Output-Based AMR in STAR-CCM+
Просмотров 2,4 тыс.3 года назад
See LinkedIn article for professional discussion: www.linkedin.com/pulse/implementing-output-based-amr-star-ccm-david-penner/?trackingId=2nTQ64upQGO4PvQDhM/Pdw See Reddit post for non-professional discussion: www.reddit.com/r/CFD/comments/ktcmvw/implementing_adjointoutputbased_amr_in_starccm/ Add me: www.linkedin.com/in/davidpenner96/
s🅱️inalla simulata
Просмотров 4,9 тыс.3 года назад
It's bad CFD, but memes don't need to be physically accurate k-ω SST IDDES 0.5 [Hz] rotation 15 [m/s] freestream velocity 75 million cells 7.5 [mm] surface mesh size 15 [mm] wake mesh size I have *a* prism layer, 2 [mm] thickness 0.001 [ms] timesteps (CFL = 1 based on the freestream velocity and wake mesh) Stationary tires, slip ground
PBR20 Drag Reduction System - Detached Eddy Simulation
Просмотров 17 тыс.4 года назад
Planar scenes taken at y = 0.38 [m], or at about 85% of the way between the centerline and the endplate.
UMSAE PBR18 Oil Sloshing Simulation
Просмотров 1,2 тыс.6 лет назад
Simulating the sloshing of oil in the oil tank of our Formula SAE Vehicle, PBR17. Material properties of 10W40 oil at 100c. Lateral and Longitudinal acceleration values were imported from a lapsim of PBR17 on an FSAE endurance track. These lapsim values may be the reason the simulation looks sped up or artificial as the lapsim assumes the vehicle is always on the friction ellipse (if not power ...
Conjugate Heat Transfer Simulation of a Desktop Computer
Просмотров 5936 лет назад
5 [mm] conformal mesh using the polyhedral thin meshers, with 8.8 million cells Some notes / things I would fix if I were to do this again. I'd like to think that if I fixed these I would have a truly professional model. -The hotspots at the VREGs and chipset were from having NO idea what the power draw would be -Contact resistances weren't included in most scenarios, future refinement would in...
Conjugate Heat Transfer Simulation of an Enthusiast Computer Heat Sink
Просмотров 3276 лет назад
6 [mm] conformal, polyhedral mesh with 4.3 million cells To-do list: Better model heat sink fin dotted ribbing in CAD -Create a better simulated environment with an attached fan and a proper heat flux profile created from a modelled CPU instead of a ducted tunnel with an applied constant heat flux -Examine thermal rise versus heat pipe effective thermal conductivity. -Adjust heat pipe effective...
STAR-CCM+ - Von Karman Sheets
Просмотров 1 тыс.7 лет назад
Compression makes me sad. If you're using STAR-CCM , I recommend exporting your animation to PNG frames and making a video from them instead of the default compressed AVI.
Music students protest budget cuts at the University of Manitoba
Просмотров 3478 лет назад
In 2014-2015, the University of Manitoba (UM) received a 2.5% increase in its provincial operating grant and it increased undergraduate tuition fees by 2.4%. In spite of those revenue increases, the UM cut the baseline budgets of faculties, schools, colleges and libraries by an average of 1.82%, cuts that had a dramatic effect on academic units and on students. This year, the administration is ...
I need some explaining
what's the practical point of refining the mesh to a point where the solver converges to 10^-7 error margin? at that point any model inaccuracy (ideal gas, steady flow, etc) will have 10000x greater effect actual on divergence from the experimental data.
To be clear, it's not 10^-7 convergence error/residual, but rather a 10^-7 error (per cell) in the cost function, such as Cl or Cd. Regardless, there's never harm in exploring more efficient mesh refinement strategies - even if they're taken to the extreme for the sake of demonstration, they can still be used to make more efficient meshes at a more practical level.
Awesome video! Thank you!
Definitely sharing this with the FSAE teams I help out.
This is really really cool
This is beautiful
why is this in my recommendation
same
Fkr the same reason as why you watched it
Hi David how are you .... could u please tell me which model did u use in the study .... I am using star ccm+
It's one of the tutorials included with STAR-CCM+, you should be able to find everything there.
What kind of a machine are you running this on? Great job!
An old university cluster that not enough people use.
What's the computational resource utilized?
An old university cluster that not enough people use.
What did you use to run the simulation? I knew LES had a higher computational cost?
I used detached eddy simulation. LES is more expensive to do correctly, but for the same mesh LES will be less expensive.
Do it again, but with 60 m/s free stream velocity so we can see what it looks like when all hell breaks loose at the apex of Parabolica!
All it's missing is the #5.
I hope you modeled Vettel's finger point in the cockpit as his Ferrari career spins off the track.
I can't think of a better usage of computational resources.
The CFD Ferrari doesn't want you to see
Beautiful David!
Hello, I'm in a FSAE team and when I saw your video about DRS I was amazed! Since I'm not very skilled in CFD, I was wondering if you could please tell me how you made that CFD with rotating wings. I'd like to make something similiar too, so it would be great if you could give some tips about the setup, maybe in pvt. Thank you!
With the sliding interface you could create a small bump in road to rotate the wheel. Personally i just use immersed boundary to rotate it
@@parthsavyasachi9348 self-developed code?
@@user-to6ud4uq5n yes. I am developer of wildkatze solver.
Great video
cool idea