In fluid dynamics, turbulence or turbulent flow is fluid motion characterized by chaotic changes in pressure and flow velocity. It is in contrast to a laminar flow, which occurs when a fluid flows in parallel layers, with no disruption between those layers. Turbulence is commonly observed in everyday phenomena such as surf, fast flowing rivers, billowing storm clouds, or smoke from a chimney, and most fluid flows occurring in nature or created in engineering applications are turbulent. Turbulence is caused by excessive kinetic energy in parts of a fluid flow, which overcomes the damping effect of the fluid's viscosity. For this reason turbulence is commonly realized in low viscosity fluids. In general terms, in turbulent flow, unsteady vortices appear of many sizes which interact with each other, consequently drag due to friction effects increases. This increases the energy needed to pump fluid through a pipe. The onset of turbulence can be predicted by the dimensionless Reynolds number, the ratio of kinetic energy to viscous damping in a fluid flow. However, turbulence has long resisted detailed physical analysis, and the interactions within turbulence create a very complex phenomenon. Richard Feynman described turbulence as the most important unsolved problem in classical physics. The turbulence intensity affects many fields, for examples fish ecology, air pollution, precipitation, and climate change. (Wikipedia).
What Is Turbulence? Turbulent Fluid Dynamics are Everywhere
Turbulent fluid dynamics are literally all around us. This video describes the fundamental characteristics of turbulence with several examples from nature and from engineering. We discuss how turbulent fluids are unsteady, three-dimensional, mixing, and multiscale. We also describe how
From playlist Fluid Dynamics
Turbulence is Everywhere! Examples of Turbulence and Canonical Flows
Turbulence is one of the most interesting and ubiquitous phenomena in fluid dynamics. In this video, we explore several examples of canonical and real world turbulent fluids, with engineering applications. Check out the excellent notes by Lex Smits: http://profs.sci.univr.it/~zuccher/d
From playlist Fluid Dynamics
Physicists use the Navier-Stokes equations to describe fluid flows, taking into account viscosity, velocity, pressure and density. But because of turbulence in fluids, proving that the equations always make sense is one of the hardest problems in physics and mathematics. Read about the epi
From playlist In Theory
Mathematics of Turbulent Flows: A Million Dollar Problem! by Edriss S Titi
URL: https://www.icts.res.in/lecture/1/details/1661/ Turbulence is a classical physical phenomenon that has been a great challenge to mathematicians, physicists, engineers and computational scientists. Chaos theory has been developed in the end of the last century to address similar phen
From playlist Public Lectures
Turbulence : An introduction to Randomly Forced Models by Jayanta K Bhattacharjee
PROGRAM TURBULENCE: PROBLEMS AT THE INTERFACE OF MATHEMATICS AND PHYSICS ORGANIZERS Uriel Frisch (Observatoire de la Côte d'Azur and CNRS, France), Konstantin Khanin (University of Toronto, Canada) and Rahul Pandit (IISc, India) DATE & TIME 16 January 2023 to 27 January 2023 VENUE Ramanuj
From playlist Turbulence: Problems at the Interface of Mathematics and Physics 2023
Equation Informed and Data-Driven Tools for Data-Assimilation and Optimal....by Luca Biferale
Program Turbulence: Problems at the Interface of Mathematics and Physics (ONLINE) ORGANIZERS: Uriel Frisch (Observatoire de la Côte d'Azur and CNRS, France), Konstantin Khanin (University of Toronto, Canada) and Rahul Pandit (Indian Institute of Science, Bengaluru) DATE: 07 December 202
From playlist Turbulence: Problems at The Interface of Mathematics and Physics (Online)
New Directions in the Statistical Mechanics of Turbulence by Nigel Goldenfeld
PROGRAM TURBULENCE: PROBLEMS AT THE INTERFACE OF MATHEMATICS AND PHYSICS ORGANIZERS Uriel Frisch (Observatoire de la Côte d'Azur and CNRS, France), Konstantin Khanin (University of Toronto, Canada) and Rahul Pandit (IISc, India) DATE & TIME 16 January 2023 to 27 January 2023 VENUE Ramanuj
From playlist Turbulence: Problems at the Interface of Mathematics and Physics 2023
Introduction to Turbulence & Turbulence Modeling
This video lecture gives good basis of turbulence associated with fluid flow. Concepts like Reynolds number, Laminar and Turbulent flows, averaging , Reynolds stress and Turbulence modeling are explained here in an engineering point of view. Check http://www.learnengineering.org/2012/12/w
From playlist Mechanical Engineering
Wild Life in the Flow Zoo on a Gas Turbine Blade by Roddam Narasimha
DATE & TIME 20 January 2018 to 25 January 2018 VENUE Ramanujan Lecture Hall, ICTS, Bangalore The study of turbulent fluid flow has always been of immense scientific appeal to engineers, physicists and mathematicians because it plays an important role across a plethora of known phenomena, e
From playlist Turbulence from Angstroms to light years
The route to turbulence by Dwight Barkley
COLLOQUIUM THE ROUTE TO TURBULENCE SPEAKER: Dwight Barkley (University of Warwick, UK) DATE: Thu, 20 February 2020, 14:30 to 16:00 VENUE: Emmy Noether Seminar Room, ICTS Campus, Bangalore ABSTRACT Explaining the route to turbulence has been a long and tortuous journey. After years
From playlist ICTS Colloquia
Statistical mechanics of developed turbulence (Lecture 1) by Nigel Goldenfeld
PROGRAM BANGALORE SCHOOL ON STATISTICAL PHYSICS - XI (ONLINE) ORGANIZERS: Abhishek Dhar and Sanjib Sabhapandit DATE:29 June 2020 to 10 July 2020 VENUE:Online Due to the ongoing COVID-19 pandemic, the original program has been canceled. However, the school will be conducted through onl
From playlist Bangalore School on Statistical Physics - XI (Online)
Spatial Modes of Light in Turbulence and their Quantum Effects by Shashi Prabhakar
DISCUSSION MEETING STRUCTURED LIGHT AND SPIN-ORBIT PHOTONICS ORGANIZERS: Bimalendu Deb (IACS Kolkata, India), Tarak Nath Dey (IIT Guwahati, India), Subhasish Dutta Gupta (UOH, TIFR Hyderabad, India) and Nirmalya Ghosh (IISER Kolkata, India) DATE: 29 November 2022 to 02 December 2022 VE
From playlist Structured Light and Spin-Orbit Photonics
Carlo Barenghi: Classical and non-classical flows of superfluids
Abstract: Superfluids are remarkable because they lack mechanisms of viscous dissipations, and because vorticity is concentrated in thin vortex lines - a property which arises from the existence and uniqueness of a macroscopic wave function. In this talk I shall review recent experiments a
From playlist Numerical Analysis and Scientific Computing
Compressibility Effects in Turbulence: Revisited by Sanjiva Lele
Turbulence from Angstroms to light years DATE:20 January 2018 to 25 January 2018 VENUE:Ramanujan Lecture Hall, ICTS, Bangalore The study of turbulent fluid flow has always been of immense scientific appeal to engineers, physicists and mathematicians because it plays an important role acr
From playlist Turbulence from Angstroms to light years
Open questions in turbulent stratified mixing:Do we even know what we do not know? by C.P. Caulfield
ABSTRACT: Understanding how turbulence leads to the enhanced irreversible transport of heat and other scalars (such as salt and pollutants) in density-stratified fluids is a fundamental and central problem in geophysical and environmental fluid dynamics. There is a wide range of highly im
From playlist ICTS Colloquia
Directed percolation and the route to turbulence by Dwight Barkley
DISCUSSION MEETING: 7TH INDIAN STATISTICAL PHYSICS COMMUNITY MEETING ORGANIZERS : Ranjini Bandyopadhyay, Abhishek Dhar, Kavita Jain, Rahul Pandit, Sanjib Sabhapandit, Samriddhi Sankar Ray and Prerna Sharma DATE: 19 February 2020 to 21 February 2020 VENUE: Ramanujan Lecture Hall, ICTS Ba
From playlist 7th Indian Statistical Physics Community Meeting 2020
Computational prediction technologies for turbulent flows by Charles Meneveau
Turbulence from Angstroms to light years DATE:20 January 2018 to 25 January 2018 VENUE:Ramanujan Lecture Hall, ICTS, Bangalore The study of turbulent fluid flow has always been of immense scientific appeal to engineers, physicists and mathematicians because it plays an important role acr
From playlist Turbulence from Angstroms to light years
Polymers in Turbulence: Stretching Statistics and the Role of Extreme Strain...by Dario Vincenzi
PROGRAM TURBULENCE: PROBLEMS AT THE INTERFACE OF MATHEMATICS AND PHYSICS ORGANIZERS Uriel Frisch (Observatoire de la Côte d'Azur and CNRS, France), Konstantin Khanin (University of Toronto, Canada) and Rahul Pandit (IISc, India) DATE & TIME 16 January 2023 to 27 January 2023 VENUE Ramanuj
From playlist Turbulence: Problems at the Interface of Mathematics and Physics 2023