|January 12, 2013, 16:24||
how to estimate air velocity near the running high-speed railroad?
Join Date: Nov 2012
Posts: 25Rep Power: 6
this question has come from my simple idea.
We all know the wind rises when veihicles pass near us.
How do we estimate air velocity near the running vehicle(cars,railroad etc..)? the observer stays and doesn't move.
In my opnion, please look at the picture i attached.
Black line is the streamline that we can easily think wth our experience,
and red region will have higher velocity than freestream like a airfoil.
Then, I think we can calculate what i want by (V_observer = V_inf - V)
like a relative velocity in dynamic mechanics.
Am I right? I expect to set a safety line in which people should stay away from the passing vehicle with V_observer.
like a .... Drag force(from V_obsrver or pressure distribution) < Friction Force(from peapole's weight, C_f of shoes)
for accident prevention.
How do you think?
Last edited by jyh3134; January 12, 2013 at 16:52.
|Thread||Thread Starter||Forum||Replies||Last Post|
|High speed water jet cavitation||Richard||CFX||0||November 18, 2008 11:07|
|velocity of air||Robert||Main CFD Forum||4||January 22, 2007 19:42|
|high speed flow with air dissociation||Victoria||Main CFD Forum||0||May 4, 2006 06:46|
|Get a free or low price CFD or engineering estimate software about micro air vehicle.||QingHua Zeng||Main CFD Forum||3||May 16, 2000 11:04|
|Simulated air velocity near ceiling||Apple L S Chan||Main CFD Forum||1||July 1, 1999 21:13|