Calculation of Lift

nauman55 · July 10, 2012, 14:17

Hi every one, i am facing a problem. i want to calculate lift of a body placed in far field. i m using SA model and 0.7 mach as boundary condition. what values should i feed in area, and length while i am computing results from far field.guidance in this regards is required.
thanx in anticipation

sicfred · July 12, 2012, 06:54

The lift that fluent calculates, is just a coefficient between the lift force (lets say in newton) and the 0.5*rho*A*v^2 wich are the reference values that you put in Fluent. Usually the area "A " is the proyection area of the body in the plane perpendicular to the far flow. In this case, i think that you dont need the reference lenght.
On the other hand, if you just want to know the lift force in newton, i recomend you to calculate in report> forces.

July 10, 2012, 14:17	Calculation of Lift	#1
nauman55 Member nauman hashmi Join Date: Jun 2012 Posts: 54 Rep Power: 13	Hi every one, i am facing a problem. i want to calculate lift of a body placed in far field. i m using SA model and 0.7 mach as boundary condition. what values should i feed in area, and length while i am computing results from far field.guidance in this regards is required. thanx in anticipation

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July 12, 2012, 06:54		#2
sicfred New Member Elias Paez Join Date: Nov 2011 Location: Madrid Posts: 25 Rep Power: 14	The lift that fluent calculates, is just a coefficient between the lift force (lets say in newton) and the 0.5rhoA*v^2 wich are the reference values that you put in Fluent. Usually the area "A " is the proyection area of the body in the plane perpendicular to the far flow. In this case, i think that you dont need the reference lenght. On the other hand, if you just want to know the lift force in newton, i recomend you to calculate in report> forces.