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CFL number

Submitted by BFarley on
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Computational Mechanics Forum
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CFD
CFL

I'm working at a University where we are developing and running interface software for CFD simmulations. There are no CFD specialists in my lab, however, so we get the information we need from a couple of other labs around campus.

Unfortunately, no one seems to know what the CFL number is, or how to use it.

Can I just get a simple explanation of the CFL number and a general range in which it should lie?

Thank you! 

quries for a battery driven car

Submitted by ashish katarkar on
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hybrid cars for 800 or less cc engines

 I am a doctor by profession  but reading about fuel prices and pollution got me in this

i use a electric scooter for last two years and its fine for my daily work as well as for my part to keep earth clean

i want to ask if i put a calcium calcium battery to run a 1000kg gross weight car with a800 cc petrol engine

firstly what battery power i need

secondly at asteady speed of 80kmph will the dynamo can recharge the batteries sothat the speed can be maintained 

wave propagation in Hamilton Systems

Submitted by Teng zhang on
research
wave propagation Hamilton Systems

I am a junior graduate student now, and very interesting in wave motion. My advisor Prof. Zhong wanxie and his PHD student qiang Gao have developed a precise numerical technique to solve the Rayleigh wave frequency equation, which can avoid the missing root. They did a systematic work involving surface wave propagation in a transversely isotropic stratified solid resting on an elastic semi-infinte space, wave propagation in the anisotropic layered media and the propagation of stationary and non-stationary random waves in a viscoelastic, transversely isotropic and stratified half space.

Open PhD position: Microstructures in Solids

Submitted by katia bertoldi on
job



Info:  The goal of this project is to investigate the mechanical and acoustical behavior of materials characterized by a well-defined miscrostructure. The research will involve experimental, theoretical and computational mechanics.

We are looking for an enthusiastic, science-driven, outstanding young
candidate with experience in solid and structural mechanics. Experience
with basic mechanical testing techniques is also appreciated.

PhD grant on error estimate and automatic grid adaptation for Reynolds Averaged Navier-Stokes Equations

Submitted by visonnea on
job

Location: Centrale Nantes, Fluid Mechanics Laboratory UMR6598, Nantes, FRANCE.

Contact: Michel.Visonneau [at] ec-nantes.fr.

Title: Discretization error estimate and automatic local grid adaptation for the computation of turbulent free-surface flows at high Reynolds number

So, What's It Gonna Be?

Submitted by ericmock on
opinion

Teacher, Scientist, or Engineer

From thinking about the 'I'd Love to Change the World' discussion, I have concluded that my dilemma stems from the (basically) three career paths from which I can choose.

A teacher that can have a great deal of influence on a select number of other individuals' lives and can take great pride in helping others achieve their potential, and possibly make great contributions to society.

A scientist that can continue to explore the unexplained and hopefully discover something that could contribute to society.

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