Of course, this is just a preliminary simulation and there are still lots of room for improvement. The contact point, angle of impact, and few other parameters are crucial to the validity of any simulation and it is difficult determine these parameters from the video.

Other important parameters are related to the ball. While we know the diameter of the standard soccer ball, it has multiple layers of different materials which I approximate them as a single layer of rubber material (this was a huge assumption). If I have the footage of water-filled soccer ball impacting a rigid wall, then I could have done more to validate the ball model.

Few things which I could have done: scale the model so that the dimensions of the head is closer to Daniel's head, apply gravity on the human body. I've just realized this after I ran the simulations and compared the results side by side.


@cfdanalysis.ir

#football_simulation #FSI
#Safety #simulation #innovation #Ball #kick_ball #CFD

There
is so much cool work to do in combustion.



Check out
this “unwrapped”, or “unrolled”, rotating detonation engine (RDE).
Nitrogen-diluted hydrogen and air are injected through the inlet ports at the
bottom of the annular chamber, and the premixed fuel-air mixture enters the
combustion region through a row of nozzles. The engine is “started” via a
detonation channel attached to the left side of the unwrapped RDE. Once the
detonation wave is set, the solution is used to initialize the unwrapped RDE
with periodic boundaries (left and right ends). When the limit-cycle is
reached, a self-sustaining rotating detonation wave continues to propagate
within the RDE channel. Adaptive mesh refinement (AMR) is used to capture the
detonation wave front, while maintaining a reasonable computational time.



@cfdanalysis.ir



#combustion #convergecfd #cfd

Energy Saving Device

A single floating device could power 17,000 homes.
@cfdanalysis.ir

#Enegy_ocean#cfd

What if the tube itself was a pump?



A simple question that led us on a research journey towards our most recent paper:
‘Fiber pumps for wearable fluidic systems’, published in this week’s issue of Science.

These pumps are thin, flexible and stretchable - in essence, tubing that generates its own pressure and flowrate silently, without moving parts. This allows high pressure fluidic circuits to be sewn directly into textiles and clothing, without the need for an external pump. In the future, these pumps could be used to power artificial muscles for soft supportive exosuits, for thermoregulatory clothing, and for wearable haptics. This work
was funded by the Swiss National Science Foundation.



@cfdanalysis.ir



#ScienceResearch #EPFL #PolitecnicoDiBari #SoftRobotics #WearableTech #SNSF

Centrifugal pump CFD & FEA + FSI simulation. DDES. Vorticity.



@cfdanalysis.ir

#engineeredmind
#science
#technology #engineering #mechanicalengineering #physics #mathematics
#fluidmechanics
#cfd #fluidflow #turbulence

Who else thinks about simulation when in flight? 👀 Know you're not alone.✈️


 @cfdanalysis.ir

#engineeredmind#science#technology
#engineering #mechanicalengineering #physics #mathematics#fluidmechanics#cfd
#fluidflow #turbulence

💦 Reversible Fluid Mixing💦

Ink is squirted into a fluid and mixed in until it disappears. By precisely
undoing the motions in the reverse direction, the ink becomes unmixed!
👉The demonstration seems to defy thermodynamics in that
it appears that entropy decreases, but in actuality the reversible mixing is made possible by ensuring that the mixing/unmixing is done without turbulence.



 @cfdanalysis.ir


#engineeredmind #science #technology #engineering #mechanicalengineering #physics #mathematics #fluidmechanics

Simulation
flow around bridges columns by CFD method.

 @cfdanalysis.ir

#engineeredmind
#science #technology #engineering #mechanicalengineering #physics #mathematics
#fluidmechanics

Attention all electronics engineers and designers!
Are you tired of dealing with overheating issues in your electronic systems? Look no
further than CFD! CFD is a powerful computational fluid dynamics (CFD) application specifically designed for electronics cooling. With its advanced simulation capabilities, CFD can
accurately predict temperature distributions and airflow patterns within your electronic systems, allowing you to optimize your designs and prevent overheating. Whether you're designing a new electronic product or trying to troubleshoot an existing system, CFD can provide you with valuable insights into the thermal behavior of your designs. With its user-friendly interface and robust modeling capabilities, you can quickly and easily create accurate simulations of your electronic
systems and analyze their performance under various operating conditions.

 @cfdanalysis.ir
#engineeredmind
#science #technology #engineering #mechanicalengineering #physics #mathematics#fluidmechanics#CFD #electronicscooling #computationalfluiddynamics #thermalbehavior #simulation #engineering #design #innovation

Beautiful #CFD 👌

Designers want to reduce oil inside gearboxes to minimize
churning losses, while ensuring oil gets to critical locations. Use the Simcenter SPH Flow meshless method to easily model the high rotation and flow passing in-between the gears and accurately capture oil jets and splashes. Such an approach results in fewer physical tests, reduced cost, and faster time to market.

 @cfdanalysis.ir

#siemens #simcenter #cfd #engineering

Internal Combustion Engine Simulation with CFD 🔥

CFD handles complex geometries, perform full cycle simulations, features automatic grid generation on the fly with adaptive and automatic mesh
refinement. You can leverage one of many turbulence models, advanced combustion models, or predictive spray models to get engine CFD solutions.

 @cfdanalysis.ir

#engineeredmind #science #technology #engineering #mechanicalengineering #physics #mathematics #cfd #simulation

Did you know that you can run qDNS simulations i Simcenter STAR-CCM+?
We will look also at the new SIMPLEC implicit unsteady scheme and see how that performs in terms of convergence.
@cfdanalysis.ir

#CFD #Turbulence #News #Simcenter #engineeredmind #science #technology #engineering #mechanicalengineering #physics #mathematics #cfd #simulation

hydrodynamics #performance #engineering is critical to the #design of any #vessels. Over the last 5-10 years #computationalfluiddynamics has played an ever-increasing role in #vesseldesign. #cfd has extended beyond external hydrodynamics to include more complex #motions and physical processes allowing the shift towards #simulating full scale vessel under real operating conditions.


@cfdanalysis.ir


#marineengineering #marine #marineindustry #marineengineer #marinetechnology #vessels #ship #shipbuilding #australianmanufacturing #australianmade #australiandesign #yatch #boat #boatdesign #shippingindustry #simcenter #starccm

Impulse mixers present a complex flapping motion. The mixing disk is driven up and down while the flaps individually open/close depending on their movement relative to the fluid. Here we show the flow around the mixing disk in terms of two-fluid mixing (left), and velocity/vorticity (right).

The motion generates a compelling flow field--and an alternative to traditional agitation via impellers.

Simulation is perfect for this type of system. And there are no tricks here. Yes, the movement of the individual flaps is correctly modeled as freely rotating objects. Yes, the solver is fully transient with an LES turbulence fluid model. Yes, the model includes a time-accurate and dynamic free surface.



This movie presents 1 one minute of mixing in a 1-m diameter vessel. The simulation contains 75 million grid points, corresponding to a grid spacing of 2.5 mm.


@cfdanalysis.ir
#engineeredmind #science #technology #engineering #mechanicalengineering #physics #mathematics #cfd #simulation

⁠Rotor blade aeroelasticity


The precise interaction between aerodynamic forces and the structural response of rotor blades is crucial in various applications such as helicopters, urban air mobility vehicles, and wind turbines. Accurate predictions of this interaction are necessary to ensure the safety and efficiency of these systems.

The dynamic loads transmitted from the rotor to the fuselage generate vibrations, discomfort and alternating stresses on the components. A promising approach is to perform aeroelastic optimization of the rotor in order to reduce the dynamic loads at their sources. This optimization can be achieved by introducing couplings between the flapping and torsional modes of the blade.

High-fidelity aeroelastic simulations are a key enabler to understand, visualize and optimize existing interactions. The blade model is an element of the fluid-structure coupling, which accepts as external loading aerodynamic forces to calculate the blade dynamics.

Numerical simulation is a great tool to evaluate the aeroelastic performances of a helicopter. Source:


@cfdanalysis.ir
#sciences #technology #engineering #mechanicalengineering #physics #cfd #simulation

⁠Hybrid RANS-LES Turbulence Model 🚗

In most industrial cases, LES is too expensive because it requires a very fine mesh, notably in the boundary layers. On the other hand, URANS gives a smooth solution where small turbulence structures and there corresponding frequencies are lost. Hence, hybrid RAN-LES turbulence model have been developed to combine the best of both world: a RANS approach in the free stream and boundary layer, and LES in the unsteady separated regions. These models are often used in aerodynamics but are also very useful in fluid structure interaction, where you need to accurately capture the fluid excitation frequencies.

The animation below shows an external aerodynamic simulation done with Star-CCM+ using the Improved Delayed Detached Eddy Simulation (IDDES) model, combined with Adaptative Mesh Refinement (AMR). Iso-surface of Q-criterion shows the turbulent coherent structures generated by the wheels and rearview mirrors.




@cfdanalysis.ir
#sciences
#technology #engineering #mechanicalengineering #physics #cfd #simulation

#cfd #IDDES #aerodynamics #starccm+

Car aerodynamic in a wind tunnel

Aerodynamics play a crucial role in determining a vehicle's performance, fuel efficiency, and overall design. One way car manufacturers test and improve the aerodynamics of their vehicles is by using a wind tunnel.

In a wind tunnel, a car is placed on a platform and exposed to a controlled airflow, which simulates real-world driving conditions. This controlled environment enables engineers to measure various aerodynamic parameters, including the car's drag coefficient, lift, and downforce.

To maximize the effectiveness of wind tunnel testing, different experimental techniques are employed. Particle Image Velocimetry (PIV) is a particularly powerful tool for studying fluid flow and can provide valuable insights into how air interacts with vehicles.

CFD is a powerful tool that can supplement experimental tests and help maximize the aerodynamic efficiency of a vehicle.
@cfdanalysis.ir

#CFD #EFD #windtunnel #vehicle #aerodynamics #car #engineering #PIV

Determining where fluids such as water and mud, which will splash in the deposits that vehicles enter along the road, will splash under or above the hood is important both for engine health and for not obstructing the driver's view.

In CFD studies, both the identification of moving parts and the capture of jumps in such cases are challenging parts.

@cfdanalysis.ir

#simcenter #cfd #sphflow #siemens

HVAC simulation as input for noise prediction. Modeled as stand-alone HVAC duct in Simcenter STAR-CCM+ and weakly coupled to Simcenter 3D for acoustic propagation
@cfdanalysis.ir

#siemens #simcenter #starccm #acoustic #cfd

I will share some important tips to get high-fidelity CFD simulations.

This simulation is part of my comparative study of motion prediction using a potential flow (PF) solver and Reynolds averaged Navier -Stokes (RANS) for DTMB 5415 in addition to a sensitivity study of setup parameters on the numerical simulation of the motion behavior in quarter waves.

The scope of this research project is to investigate different alternative methods that can be applied to determine ship motions as they differ significantly in terms of accuracy and computational effort.
@cfdanalysis.ir

#projects #cfd #researchanddevelopment #hydrodynamics #offshore #ship #engineering #share #knowledge #design #researchfellow