Rajat Walia

The Navier-Stokes Equations!

In physics, the Navier-Stokes Equations are partial differential equations which describe the motion of viscous fluid substances, named after French engineer and physicist Claude-Louis Navier and Anglo-Irish physicist and mathematician George Gabriel Stokes.

They were developed gradually over several decades, from 1822 (Navier) to 1842-1850 (Stokes), and have been used to generate numerical solutions for fluid flow ever since.

Equation derivation: https://lnkd.in/dSEZukFw

Picture and Video credit: Jousef Murad

#mechanicalengineering #mechanical #scienceandtechnology #aerodynamics #aerospace #automotive #research #simulation #cfd #flow #fluidmechanics #fluiddynamics

Flow over airfoil at 30 degrees Angle of Attack.

Wing Stalling flow visualization.

Source: Unknown, please tag the original source in the comment section if it is known.

#mechanicalengineering #mechanical #aerospace #automotive #aerodynamics #cfd

My first few days at the Mercedes-Benz AG R&D office in Germany were fantastic.

This is a great place to work, and I will be learning a lot from my amazing coworkers.

Establishing a tangible connection with the product is crucial, especially if you are involved in its digital creation phase!

Cars are mechanical wonders!

The birth and evolution of differential concepts and design in cars.

The differential is a system of gears that allows different drive wheels (the wheels to which power is delivered from the engine) on the same axle to rotate at different speeds, such as when the car is turning.

Source: mechanicals0 [TikTok]

#mechanical #design #cars #research #simulation #mechanicalengineering #cfd #aerodynamics #aerospace #automotive #scienceandtechnology #engineering #motorsport

The terrifying incident happened six years ago between Bombardier Challenger 604 business jet & Emirates Airbus A380-800.

As the two aircraft cruised towards their respective destinations, the Challenger 604 was flying at an altitude of 34,000 feet.

Meanwhile, traveling in the opposite direction, the Airbus A380 was just 1,000 feet higher.

The two aircraft crossed paths at 08:38 UTC, while flying over the Arabian Sea in Indian airspace.

The turbulence generated by the Airbus A380 didn't impact the Challenger immediately.

About 48 seconds after it passed by the two aircraft were already 27.8 km away from each other.

The wake turbulence caused by the superjumbo Airbus - the world's largest passenger jet - was so powerful that The Challenger was sent into an uncontrolled roll that flipped the aircraft between three and five times.

Wake turbulence is formed behind an aircraft as it flies through the air, much like a boat creates a wake in the water.

It is exacerbated by a pair of vortices - whirling masses of air - that spin from the wingtips.

The bigger the plane, the bigger the wakes. The most virulent wakes leave smaller planes vulnerable if they run into one.

CNBC reported at the time that the impacts of the superjumbo's wake turbulence had caused the private jet to roll at least three times.

This movement threw the jet's passengers and other objects around the cabin causing multiple hospitalizations.

Source: Megaaviation @Instagram

#mechanicalengineering #mechanical #aerospace #automotive #cfd #aerodynamics

Nature inspired aerodynamically shaped bullet train!
 
A video by ​BBC News​ explains the aerodynamic design of Japan's famous bullet train.
 
The Japanese Shinkansen bullet train travels at 150–200 mph.
 
The train used to make a loud boom when it travelled through tunnels, as compressed air in front of it created a sound wave.
 
Thanks to a spot of bird-watching, an engineer was able to fix the problem after he was inspired by a kingfisher.
 
A new train with a kingfisher's beak motif was designed.
 
The train was faster, quieter, and more powerful with 30% less air resistance than before.
 
Watch this amazing video till the end ;)
 
#mechanicalengineering #mechanical #aerodynamics #aerospace #automotive

12 Steps to Navier-Stokes: A Python based walk-through by professor Lorena A. Barba.

Step by Step 12 python module to write your own 2D Navier-Stokes finite-difference solver from scratch.

Step 1 1D Linear Convection
Step 2 1D Non Linear Convection
Step 3 1D Diffusion Equation
Step 4 1D Burger's Equation
Step 5 2D Linear Convection
Step 6 2D Non Linear Convection
Step 7 2D Diffusion Equation
Step 8 2D Burger's Equation
Step 9 2D Laplace Equation
Step 10 2D Poisson Equation
Steps 11–12 solve the Navier-Stokes equation in 2D
Step 11 2D Cavity Flow
Step 12 2D Channel Flow

Highly recommend exercise who wants to get into the CFD code development subject.

Course link in the comment section.

#mechanicalengineering #mechanical #automotive #aerospace #aerodynamics #cfd #computationalfluiddynamics #simulation #research #fluidmechanics #scienceandtechnology #fluiddynamics