Need help on boundary conditions on aerofoil simulations

LSC · May 3, 2009, 14:15

Hi guys, need some advices on the boundary conditions on simulations of aerofoil. I have managed to mesh out the airfoils together with the computational domain. My domain consist of a semi circle encompassing the aerofoil and two rectangles downstream the airfoil. I am wondering is there any steps to define the boundary conditions as I am looking for the flow transition point. Do I have to select the turbulence model such as k-e or laminar? Please advice.

harishg · May 5, 2009, 14:08

Its hard to visuvalize the field without a plot. Usually one part of the farfield is defined as inflow and other part as outflow. If you want to observe transition point (to turbulence ?), ensure to use a RANS model which has the ability to capture transition accurately.

LSC · May 10, 2009, 03:35

Thanks a lot..Do you have an experience on CFX? My side just got hold of this solver and I am completely new to it. would appreaciate much if you could shed some light on this software. Many thanks!

May 3, 2009, 14:15	Need help on boundary conditions on aerofoil simulations	#1
LSC Member LSC Join Date: May 2009 Posts: 58 Rep Power: 17	Hi guys, need some advices on the boundary conditions on simulations of aerofoil. I have managed to mesh out the airfoils together with the computational domain. My domain consist of a semi circle encompassing the aerofoil and two rectangles downstream the airfoil. I am wondering is there any steps to define the boundary conditions as I am looking for the flow transition point. Do I have to select the turbulence model such as k-e or laminar? Please advice.

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May 5, 2009, 14:08		#2
harishg Senior Member N/A Join Date: Mar 2009 Posts: 189 Rep Power: 17	Its hard to visuvalize the field without a plot. Usually one part of the farfield is defined as inflow and other part as outflow. If you want to observe transition point (to turbulence ?), ensure to use a RANS model which has the ability to capture transition accurately.

May 10, 2009, 03:35		#3
LSC Member LSC Join Date: May 2009 Posts: 58 Rep Power: 17	Thanks a lot..Do you have an experience on CFX? My side just got hold of this solver and I am completely new to it. would appreaciate much if you could shed some light on this software. Many thanks!