Sunday

March 29, 2015

March 29, 2015

Posted by **Akhtar** on Tuesday, April 12, 2011 at 4:55pm.

In a turbulent motion the length scale (l) and the time scale (t) of the smallest eddy motions vary according to:

length scale: l/L = Re^(-0.75)

time scale t/(L/U) = Re^(-0.5)

(actually there should b tht symbol for proportionality rather than the equal sign in the above two expressions...dont know how to use tht symbol here!)

where the Reynold's no Re=(L*speed/kinematic viscosity)

Question: How do the a) number of grid nodes and b) the number of time steps required to compute the properties of a turbulent flow depend on the Reynold's number?

I tried substituing 1000 for the Re number in the above two expressions for length and time scales but am not sure wat to do after tht. I guess if someone knowldegable cud explain how the node or time scales are worked out n used for computation ill better understand the question n hopefully then work the answer out. I just think I dont know much abt how the nodes n time step things work.

Thanks,

AKHTAR

**Answer this Question**

**Related Questions**

math (8th grade) - The length of each piece in a model train railroad built on ...

Science - Which scale measures the amount of damage after an earthquake? Richter...

earth, science - Which of the following statements describes the development of ...

Earth Science - 11. Which earthquake scale takes into consideration the damage...

Math - The Table shows some common scales used in a model railroading.For each ...

Physics - A 4.8 kg container of water sits on a scale A. A cube of aluminum ...

Math - A scale drawing of a house is drawn with a scale of 1 in. : 16 ft. Find ...

physics - If you stand on a bathroom scale, the spring inside the scale ...

physics - If you stand on a bathroom scale, the spring inside the scale ...

Science - Which of the following gases was most likely present in Earth's ...