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

Within Simcenter Star-CCM+ software, the term self-propulsion refers to the simulation of movement within a flow medium in which objects or entities can move on their own based on their design or specified behavior.


Spontaneous motion simulations using STAR-CCM+ can be used
to study the performance of vessels, submarines or autonomous underwater vehicles moving on water.



☑ You can test multiple hull/propeller combinations to find the best efficiency.

☑ You can perform full-scale tests early in the design cycle to ensure critical performance parameters are
met.

☑ You can evaluate performance
in a variety of real-world conditions to determine power requirements in any marine situation.

☑ With quick turnaround, it
allows the simulation to guide the design: By using the virtual disk model to represent the propeller, you can calculate the self-drive points in hours
instead of days.
@cfdanalysis.ir

#simcenter #starccm+ #cfd #engineering #marine

Rigid Body Motion (RBM) describes the position, velocity and rotational motion of an object. This motion describes how the object moves in a
space. Rigid Body Motion analysis is widely used in engineering applications to understand the motion and behavior of mechanical systems. Simcenter STAR-CCM+ enables a variety of applications using Rigid Body Motion (RBM) modeling. Realistic simulations of moving objects are
indispensable for design improvements and performance analyses. When propeller behavior is to be studied, structural effects, ventilation and cavitation effects, and propeller geometry can be modeled and optimized, which helps to create more efficient designs.

@cfdanalysis.ir

#simcenter #starccm+ #cfd #engineering #optimization
#simulation

⁠Multiphase CFD for clear vision 🤓

Many multiphase applications require accurate, yet efficient treatment of droplets sliding across surfaces.

💧 Typical use cases include tracing rain droplets sliding on the surfaces of moving vehicles, including windshields, mirrors, and car sensor surfaces.

🌊While it is in principle possible to use the high-fidelity Volume of Fluid (VOF) method, it is very expensive, and for a large number of sliding droplets, the VOF simulation is computationally prohibitive.
👩‍💻 To predict the dynamics of these droplets on surfaces, a Lagrangian approach is very efficient, but it is of fundamental importance to take surface tension effects into account with high accuracy.


🎆 With Simcenter STAR-CCM+ 2310 we therefore introduce a new type of Lagrangian phase, so-called wall-bound droplets, and a new particle shape model called Spherical Cap Particles. 🥳 The whole new modeling framework, with its first sub-models, enables you to run simulations with accurate and fast tracking of sliding droplets and rivulets. This results in improved accuracy and speed of water management simulations.
@cfdanalysis.ir
#simcenter #cfd #simulation #multiphase #vof

Hydrogen is everywhere these days, including CFD!

In this study, we simulated a dual swirl coaxial injector,
called a HYLON (Hydrogen Low NOx) burner. On the left we've captured an
attached flame condition under low fuel and air flow rates. On the right, the
conditions produce a lifted flame. Lifted flames typically produce less NOx
than attached flames, making it desirable to operate the burner in this regime.
@cfdanalysis.ir

#convergecfd #cfd #hydrogen

Electric vehicle water wading

The location of the battery in electric vehicles represents
a challenge in terms of water management and resistance to environmental
conditions. In the automotive industry, understanding these issues is key to
ensure the durability and optimum performance of electric vehicles.
Proper protection of electric vehicles from excessive
exposure to water is important to prevent damage, particularly to the battery.
Effective drainage management near the battery can avoid any potential
water-related risks. At the same time, various factors also have an impact on
the electric car, such as the vehicle's ride height or problems associated with
extreme weather and dirt.
CFD simulations enable the drainage and flow of water around
the lower battery panels to be visualized, as well as the identification of
sensitive areas where water could accumulate. It provides information about
areas of water concentration and it helps engineers decide how to make things
better, like adding extra protection. This ensures that electric car batteries
stay strong for a long time, even in challenging environments.
@cfdanalysis.ir

#ElectricVehicles #AutomotiveIndustry #WaterManagement
#EnvironmentalResistance #CFDSimulations #EngineeringSolutions #Innovation
#ElectricAutomotiveIndustry

🚗 What's your favorite
way to visualize a vortex structure?

This classic LeMans Racecar external aerodynamics is used to
benchmark new computing platforms in Simcenter STAR-CCM+.

The visualisation show q criteria isosurfaces coloured in
vorticity magnitude, while the body shows the wall shear stress magnitude
logarithmically.

Then it all gets "painted" over by a section
showing the total pressure coefficient, leaving the body coloured in pressure
coefficient.

@cfdanalysis.ir



hashtag#simcenter hashtag#siemens hashtag#cae
hashtag#engineering hashtag#cfd

CFD for Air Conditioning? 🥶 It is SO MUCH more!

Our new Thermal Cabin Comfort CFD models can predict
passenger - based on scientific and industry-relevant Fiala models and more.

My personal highlights:

💯 hundreds of options in
the templates! Tall woman, small fat man - you name it, we have it!

👥 Manekins consist of 57
individual regions with detailed models of skin heat, fat insulation etc etc.

♨ Radiators, heat venting, air conditioning, solid heat transfer...

🌞 solar radiation with an easy model.

👨‍👨‍👧‍👦
17 regions on the bodies predict the fiala comfort indices "Percentage
People Dissatisfied"

Why is this relevant?

🔥 In internal combustion engines, you have a fantastillion tons of waste heat you can use to keep your passengers warm.

🔋 Heating, cooling etc. reaaally harms EV range - if done in the classical "i don't care for
efficiency" approach.

@cfdanalysis.ir



hashtag#simcenter hashtag#cfd hashtag#fiala
hashtag#simulation hashtag#cabincomfort

Simcenter STAR-CCM+ 2310 now has the capability to simulate cohesive non-spherical particles. Recently, I tried out this new feature to
simulate a test that determines the material static angle of repose using the hollow cylinder method. In the simulation, I set the cohesion parameter to a very high value, and the resulting animation showed that instead of forming a conical shape pile by flowing out of a moving cylinder, the cohesive particles formed a cylindrical structure that eventually broke into two fragments.
@cfdanalysis.ir

hashtag#Simcenter hashtag#DEM hashtag#particles

⁠Schlieren photography

Schlieren photography is an optical technique used to
visualize variations in the refractive index of air or other transparent
substances. In a schlieren photography system, a light source directs a beam
through a transparent medium. A curved mirror or lens focuses the light onto a
knife-edge, creating a shadow. Variations in the refractive index of the medium
deflect the light rays, producing bright and dark patterns. A camera captures
these patterns on a background, visualizing phenomena such as fluid flow and
heat distribution.
Schlieren photography
is widely used in scientific research and teaching to study phenomena such as
thermal convection, shock waves and air turbulence. In the video below, shock
waves can be observed for a supersonic flow over a cavity using schlieren
photography. This study can be applied, for example, to the supersonic
combustion in cavity-based scramjet.
Since schlieren
photography has provided over the years almost satisfied results, researchers
use data from this technique as a target, aiming to improve CFD software. Both
Schlieren and CFD data can be also used in combination in order to gain a
comprehensive understanding of fluid phenomena.
@cfdanalysis.ir

#SchlierenPhotography #CFD #Combustion #Shockwaves
#Engineering

✈ Aerospace
simulating 'everything' is becoming increasingly common in industry

HEEDS Design Space simulation handles complex geometry
changes, or directly within Simcenter STAR-CCM+ design manager.

A new release of HEEDS is upon us, with exciting new #ai
capabilities

@cfdanalysis.ir

#simcenter #siemens

Simcenter STAR-CCM+ 2310 has been released with many
exciting new features, including a new type of Lagrangian phase called the
wall-bound phase. This phase is used to simulate droplets sliding across
surfaces. The new Adhesion Model, available for wall-bound droplets, takes
surface tension effects into account with high accuracy. The Lagrangian
approach for simulating sliding droplets can be very efficient. The animation
shows rain droplets sliding on a windshield, simulated in under 4 minutes.
@cfdanalysis.ir

#Simcenter hashtag#CFD #Lagrangian #droplets

⁠Aircraft wing stall

In fluid dynamics, stall refers to a sudden loss of lift and a reduction in aircraft performance due to the separation of the airflow over the wing surface. It is a critical concept in aviation, as it can lead to dangerous situations if not properly managed.


Air moves faster over the upper surface of the wing,
creating a lower pressure compared to the lower surface. This pressure
difference generates lift, which lifts the aircraft into the air. When the
angle of incidence exceeds its critical angle of attack and becomes too steep,
the airflow detaches from the upper surface. The result is a sudden reduction
in lift which, if left uncorrected, can lead to serious damages. Other
parameters such as low speed, overloading, turbulence or ice formation on the
wing can also contribute to a stall.


Stalls are most likely to occur during take-off, climb,
approach and landing. Managing the aircraft's angle of attack and speed during
these phases is essential to avoid stalls, especially at critical moments close
to the ground. To recover from a stall, you need to reduce the angle of attack
by lowering the aircraft's nose, increasing power if available, and using
ailerons and rudder to regain control.
@cfdanalysis.ir

#stall #aircraft #physics #fluidmechanics #engineering
#cfd#simulation

Brush those pearly whites! 🦷 🪥

We're having some fun with simulation for Dental Hygiene Month, for example by simulating the abrasive contact between tooth and brush through flexible fiber Discrete Element Method (DEM).

hashtag

#DentalHygiene hashtag
#simulation

⚡Modeling Turbofan Engines to
Understand Aircraft Noise⚡

This simulation shows the complex flow of air particles
through the Source Diagnostic Test turbofan engine. By simulating the fan’s
rotations, researchers can target design innovations and modifications to reduce the impact of fan noise on people living and working in areas with heavy
air traffic.
@cfdanalysis.ir



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

🔊 A New Dimension in
Audio Performance: Siemens Simcenter STAR-CCM+ Acoustics!

The Lighthill Wave Model analyzes the propagation of sound
using the acoustic analogy method, but neglects the effect of the flow field on
sound propagation. It can be used in applications such as heating, ventilation,
and air conditioning (HVAC) duct noise.
Simcenter STAR CCM+ Acoustics is designed to optimally
analyses and optimize the sound propagation of the flow area. You can take the
lead in aero acoustic simulations and perfect your product sound performance!

@cfdanalysis.ir

#simcenter #starccm+ #cfd #engineering #acoustics