How to plot Lift and Drag Coefficients using tecplot 360

RuiVO · October 7, 2011, 06:14

Hello, I can calculate the integral values of forces and momentums over an airfoil surface but I can't obtain a plot from it. In the x variable option I can't select x coordinate. Instead the index "i" is selected and I don't see any curves.

Best Regards

Rui

giuli@ · October 19, 2011, 09:09

Hi Rui,
which solver are you using?

RuiVO · October 19, 2011, 09:13

Hi giuli@, I'm using the simpleFoam solver, for incompressible steady flow over an airfoil.

Best regards

Rui

giuli@ · October 20, 2011, 09:21

I'm not really into OF;
what I remember about plotting Cl in Tecplot360 with Fluent data is that I had to extract the variables I wanted in Fluent itself (saved in .xy files), and than import these and make xy plots in Tecplot.

Try to find the way of telling openfoam to get the Cl, Cd along the desired section for all the X values (what I was doing in Fluent),
Then, make a ".dat" file with this header:

VARIABLES="x","Cl","Cd"

and under, in columns, the corresponding values extracted.

Sorry but it's all I can think now :-/

giuli@ · April 13, 2012, 06:13

Errata corrige: I was plotting velocities components (it doesn't make sense to plot Cl and Cd along x since these are integral values)

scott_rumage · April 13, 2012, 14:17

Rui,

You might review this tip on the Tecplot web site to see if it helps you with your question: http://www.tecplot.com/Training/Plot...dyResults.aspx

Regards,
Scott

October 7, 2011, 06:14	How to plot Lift and Drag Coefficients using tecplot 360	#1
RuiVO Member Rui Vizinho de Oliveira Join Date: Sep 2011 Posts: 31 Rep Power: 14	Hello, I can calculate the integral values of forces and momentums over an airfoil surface but I can't obtain a plot from it. In the x variable option I can't select x coordinate. Instead the index "i" is selected and I don't see any curves. Best Regards Rui

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October 19, 2011, 09:09		#2
giuli@ New Member FlowLy Join Date: Aug 2010 Location: Germany Posts: 18 Rep Power: 15	Hi Rui, which solver are you using?

October 19, 2011, 09:13		#3
RuiVO Member Rui Vizinho de Oliveira Join Date: Sep 2011 Posts: 31 Rep Power: 14	Hi giuli@, I'm using the simpleFoam solver, for incompressible steady flow over an airfoil. Best regards Rui

October 20, 2011, 09:21		#4
giuli@ New Member FlowLy Join Date: Aug 2010 Location: Germany Posts: 18 Rep Power: 15	I'm not really into OF; what I remember about plotting Cl in Tecplot360 with Fluent data is that I had to extract the variables I wanted in Fluent itself (saved in .xy files), and than import these and make xy plots in Tecplot. Try to find the way of telling openfoam to get the Cl, Cd along the desired section for all the X values (what I was doing in Fluent), Then, make a ".dat" file with this header: VARIABLES="x","Cl","Cd" and under, in columns, the corresponding values extracted. Sorry but it's all I can think now :-/

April 13, 2012, 06:13		#5
giuli@ New Member FlowLy Join Date: Aug 2010 Location: Germany Posts: 18 Rep Power: 15	Errata corrige: I was plotting velocities components (it doesn't make sense to plot Cl and Cd along x since these are integral values)

April 13, 2012, 14:17		#6
scott_rumage Senior Member Scott Rumage Join Date: May 2009 Location: Seattle, WA Posts: 152 Rep Power: 16	Rui, You might review this tip on the Tecplot web site to see if it helps you with your question: http://www.tecplot.com/Training/Plot...dyResults.aspx Regards, Scott