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-   -   Human Powered Vehicle Study (http://www.cfd-online.com/Forums/star-ccm/73217-human-powered-vehicle-study.html)

robinfisichella March 2, 2010 09:08

Human Powered Vehicle Study
 
Hi, I am currently conducting an investigation into the aerodynamics of a human powered vehicle such as seen here http://www.speed101.com/photos.htm

My aim is too closely match a published figure for a certain HPV of Cd=0.045

I am having some issues currently, my console is giving me limited tubulent viscoscity problems.

Could someone please suggest if any of my input conditions seem off?

Sparat Allmaras Model
Velocity=32.25 (0 yaw)
Turb viscosity ratio=5
or
Turb intensity=0.01 (value as seen, this means 1% right?)
Length scale 20m (half the domain height)
velocity scale = 0.4m/s

Im using a trimmer mesh, the object is close to the ground, no rotating wheels. I am using a wind tunnel type domain with slip walls as the far field boundaries.

Cheers


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