#Siemens Simcenter STAR-CCM+ & HEEDS
Drone maker uses Simcenter STAR-CCM+ and HEEDS to deliver the world’s first true ducted fan VTOL UAV.

A comprehensive digital twin to design for high hover thrust while reducing drag for cruise. Inquire to learn more about this customer success story.

@cfdanalysis.ir

#cae #cfd #engineering #aerospace

*A pressure-swirl atomizer is a
type of atomizer used in applications such as fuel injection in combustion
systems, spray coating, and aerosol generation. It's designed to produce a fine
spray of liquid by utilizing the energy of a high-pressure liquid stream and the forces generated by its swirling motion.
**In this video, a coupled volume of fluid and wall-modeled large eddy simulation (VOF-LES) approach was used to model both the internal and external flow of a pressure swirl atomizer in a single simulation. The presence of an air core in the spin chamber causes the liquid to leave the injector as a thin film. Instabilities cause disturbances to grow on this film, leading to its disintegration into ligaments, which either continue to break up or are drawn into spherical droplets by surface tension, completing the primary atomization process. The High-Resolution Interface Capturing scheme is employed in conjunction with Adaptive Mesh Refinement to efficiently resolve the liquid-gas interface. This strategy allows the air core, thin film, and ligament/droplet formation to be captured while maintaining a significantly lower cell count than a fixed grid would require.
@cfdanalysis.ir
#simcenter#combustion#simulation#hydrogen#cfd #atomizer #spray

⁠#Siemens Simcenter STAR-CCM+
🌪 🌧

Sensors provide a stream of information that is used by Advanced
Driver-Assistance Systems (ADAS) to make driving decisions. As users become
more dependent on these systems it is imperative that vehicles are not rendered
“blind and deaf” by sensor soiling through rainwater, a splatter of mud or even
a carefully aimed bird dropping.

Simcenter STAR-CCM+ enables cars to optimize their aerodynamic designs to
reduce sensor contamination for safer ADAS systems.



Shown here is the shape optimization of the fairing around side view mirror
camera for reduced soiling. The final shot shows the difference in film
thickness between baseline and optimized design.

@cfdanalysis.ir

#cae #cfd #simulation #adas

NACA 0012 Aerodynamics Animation. Angle of Attack 20
degrees. URANS SST, Slowed down about 24x.

@cfdanalysis.ir

#foil #windenergy #CFD #fluiddynamics#wake

CFD of an electric motor ⚡

To design an electric motor, CFD simulations are not enough. But still, the Simcenter portfolio got your back. Simcenter Motor-solve and Simcenter STAR-CCM+ can couple design explorations to optimize your electric motor design.
🧲 simulate the electromagnetic effects of hundreds of designs. 2D, 3D, as you wish.
🔥 Take a closer look at your losses and how you treat them: counter waste heat with efficient cooling.

There are just so many features to speed up and simplify these simulations, e.g., 2D to 3D mapping: in a blink of an eye, you simulate your 2D design and then just map that onto a volume. This way you get an initial solution for advanced 3D simulations - or just a quick estimate for your conjugate heat transfer simulation.
@cfdanalysis.ir
#electriccar #emag #cfd #simulation #simcenter

⁠Simulation of a Lawn Mowing Robot - and why you need to dampen your grass! 🚜
This simulation is NOT a CFD. It is a mesh-free DEM, Discrete Element Method simulation, performed in Simcenter STAR-CCM+. It simulates mechanical behaviour of discrete particles, interacting with the solid walls - of the mower, the floor and the blades.
🥬 The grass is modeled with a Flexible Fiber model - several capsule particles attached to each other.
🥒 These Flexible Fibers use a breaking mechanic model to split up on a certain force applied.
🕸 there is NO mesh. Thus, the air is not simulated, but the particle simulation gets sped up by some orders of magnitude.
🌬 normally, grass does not "wobble" around. It is relatively flexible, but its air drag provides swaying from impacts. As the air is not modeled, there is no dampening.
🥦 to prohibit this unphysical behaviour, a dampening force can be applied, still using fast meshless simulations.
But still, if you want to take the air into account, you can ad one-way coupling, so the air influences the particles, or even two-way coupling, so the air is also affected by the particles!
What do you think, does our agricultural machinery benefit from meshless simulations or do we always need to take particle drag into account? 🤔
@cfdanalysis.ir
#simcenter #simulation #discreteelement #agriculture #lawnmower

#Siemens Simcenter STAR-CCM+ 🚗

Side mirror noise simulation for the AeroSUV vehicle at 130 kph speed. We can see the transient wake of the side mirror resolved with incompressible IDDES. Acoustic pressure fluctuations on the driver side glass, resolved with the Perturbed Convective Wave (PCW) model. Run in Simcenter STAR-CCM+ 2306, double precision, using our Side Mirror Noise Template. With Ray Tracing we can see the reflection of the wake on the side glass.
@cfdanalysis.ir
#cae #cfd #simulation #engineering

⁠⚡RANS vs URANS vs DES Turbulence Modeling on NACA 0012⚡
👉 RANS stands for Reynolds-Averaged Navier-Stokes
It is a method that averages the flow variables over time to obtain a mean flow field and then models the effect of turbulence using additional equations for the turbulent fluctuations. RANS models are computationally efficient and widely used for industrial applications, but they have limitations in capturing complex flow features and unsteady phenomena.
👉 URANS stands for Unsteady Reynolds-Averaged Navier-Stokes
It is a method that solves the RANS equations in a time-dependent manner, allowing for some unsteady effects to be captured. URANS models are more expensive than RANS models, but they can provide more accurate results for flows with large-scale periodic fluctuations, such as vortex shedding or oscillating jets.
👉 DES stands for Detached-Eddy Simulation
It is a hybrid method that combines RANS and LES (see below) in different regions of the flow domain. DES uses RANS near solid boundaries where the grid resolution is coarse, and switches to LES in regions where the flow is detached and the grid is fine enough to resolve the large eddies. DES models are less costly than LES models, but they can suffer from numerical issues at the interface between RANS and LES zones.
@cfdanalysis.ir
#engineeredmind #science #technology #engineering #mechanicalengineering #physics #mathematics #cfd

Industrial machinery optimization? We've got you covered. 😎 Thanks to simulation, noise can be simulated before a prototype is built. That means noise requirements can be met and machinery optimized.
@cfdanalysis.ir
#engineeredmind #science #technology #engineering #mechanicalengineering #physics #mathematics #cfd

Simulation of Airflow in electric aircraft engine
compartments

Electric aircraft are reshaping aviation, and understanding airflow dynamics is
crucial. Simulating airflow within the engine compartment and around the
aircraft exterior is a key to improve efficiency and safety.

Computational Fluid Dynamics (CFD) allows to understand complex airflow,
helping engineers prevent overheating by designing efficient cooling systems.
This ensures optimal performance and thermal management. Battery systems,
absence of combustion engines, and thermal sensitivity require innovative
solutions for heat distribution and cooling.

Beyond the engine aerothermal performances, CFD predicts drag, lift, and
maneuverability. Simulating airflow around components refines design to enhance
efficiency, especially without traditional engine exhausts.

@cfdanalysis.ir

#sciences #physics #fluidmechanics #engineering #cfd #simulation #aircraft

#Siemens Simcenter STAR-CCM+ in Turbomachinery



DES #CFD transient cooling analysis at a turbine blade trailing edge.



Simcenter STAR-CCM+ 2210 enables the #GPU acceleration of the Segregated Energy solver with the Ideal Gas equation of state. This will significantly speed up your thermal analysis simulations, like #DES transient cooling analysis at a #turbine blade trailing edge. With those
enhancements, we continue to enable you model the complexity of today’s
products while going faster. Thereby ensuring consistent results between GPU
and CPU-based calculations.
@cfdanalysis.ir

#sciences #physics #fluidmechanics #engineering #cfd
#simulation

The #Siemens ecosystem of experts never fails to amaze me! Here is the visualization of the flow around the SimRod car, computed either
from Simcenter STAR-CCM+ or from a surrogate machine learning model. Particles are following the flow field and the numerical solver is implemented on the GPU for real-time visualization and interaction. The whole 3D scene is assembled in Omniverse.
@cfdanalysis.ir

#machinelearning #ai #metaverse

Driver’s Cabin Thermal Comfort 🌡

Thermal comfort is not only for passengers, but also for the driver. CFD analysis must be carried on in order to ensure effective cooling/heating in the worst summer/winter scenarios. The main goal is to have a uniform temperature field and try to minimize temperature gradients within the cabin. It is never comfortable to have freezing feet and a burning head ! Below is a video of an unsteady cooling simulation of a cabin from a low-floor light rail. The solar load model was used to take into account the radiation across the windshield and side windows. The driver is not physically represented but its heat rejection is applied on the seat surface.

@cfdanalysis.ir

#cfd #starccm+ #railway #thermalcomfort

Airfoil
Aerodynamics - NACA 0012, AOA25DEG, DES k-omega, Re70000, 400kCells, Vorticity.



@cfdanalysis.ir

#cfd #starccm+ #foil #airfoil

#Siemens Simcenter STAR-CCM+ ⛵
🌊
Super Yacht Aerodynamics

Personally, as a data-oriented person, I think it's cool to see the a union of CFD data in the form of both local raw contours as well as in a summarized fashion, in the same visualization. If we focus too much on local behaviors, then we can divert our attention from important macro/global trends - and vice versa!

More than many other type of ships, yachts need to be unique. In fact, design and comfort are often the main differentiating factors. Therefore, unique
solutions and numerous modifications are absolutely essential ingredients for
designing and building yachts.
@cfdanalysis.ir

#cae #cfd #simulation #marine

Cavitation is a common phenomenon in fluid physics yet it can cause potential damage to flow structures such as pump impeller, valve
body, etc. The simulation is a study around a 4-inch valve under a normal operating condition. By monitoring pressure and other parameters, it is made easier to answer when, where and how the cavitation is formed.

@cfdanalysis.ir

#CFD #cavitation #valve #simulation #fluiddynamics

Boat CFD 🚤

Have you ever seen a boat CFD - and what the mesh actually does during the simulation?

🚤 You start with a 6DOF (6 degrees of freedom) approach, meaning that your model can freely move in
space.

🕸 then you create TWO meshes. One is for the sea - maybe average speed of the boat, maybe wind, maybe waves?

🕸 The second mesh is fixed to the moving boat.

🛳 In most straight line cases, your boat is "only" moving up and down and rocking in the waves.

🌊 Of course you need a eulerian multiphase approach. And you can refine it! Fluid film captures the
effects wetting the hull and maybe the superstructure of the boat. Lagrangian models are fit for drops that fly around.

@cfdanalysis.ir

#simcenter #starccm #simulation #cfd #marineengineering

Ventilation, Filtration, and Air Monitoring are vital to
reduce respiratory viral transmission and infection.

What is your workplace doing to keep you safe?

🏥 How much is sickness
costing your business?

😫💨 NOW is the
time to protect your workforce from respiratory infections ahead of the autumn
and winter.

✔ Clean and monitor the air that
you, your customers, and your employees breathe.

✔ Include airborne pathogens on
your strategic and operational risk maps.

@cfdanalysis.ir

#business #risk #riskmanagement #leadership
#healthandsafety #health
#healthandwellbeing #nhs #publichealth #publicpolicy #economy2023 #covid19
#longcovid #hrcommunity #hrexecutive #csuite
#shareholdervalue #profit #boardofdirectors #nonexecutivedirectors #iaq
#esg #tech #scienceandtechnology #cleanairsolutions #cleanairmatters #strategicthinking

Simcenter STAR-CCM+ provides a comprehensive environment for
modeling fluid-structure interaction problems.

This animation shows a motorized and propeller-driven boat moving in head waves.

The simulation of the deformation of the propeller rotating at constant speed on a moving boat can be calculated with Simcenter STAR CCM+.

@cfdanalysis.ir

#simcenter #starccm+ #cfd #engineering #optimization
#FluidStructureInteractıon

CFD = Computational *Fun* Dynamics?

Sometimes a fun simulation reveals some really cool
features.
Autonomous meshing allows CFD engineers to easily and
accurately predict the interaction between fluid flow and deforming boundaries
as demonstrated in this simulation of an inflating balloon. The cut planes show
you the mesh, where cells are dynamically placed exactly where you need them to
capture complex flow structures, and easily in the new volumes created by the
expansion. With each breath, the balloon inflates.
@cfdanalysis.ir

#cfd #STAR_cfd #letsparty#mesh_morphing