coefficient drag
hello
I am new to CFD, conducted an analysis of flow around a vehicle, I want to determine the coefficient of drag and lift the speed is in the zaxis direction, is appropriate to draw "Force Z" in the body of the vehicle and use the maximum value and apply it to find the drag coefficient. such as graphing the drag coefficient? which method should I take? need help!!!!:confused::confused: thanks 
What do you mean by the maximum value of the force Z? The force probably is not steady so the force Z will not be constant  unless you have managed to get a turbulence model to average all the flow back to a steady state, which is unlikely to be accurate.

Plot coefficient drag??
My question is how to plot the drag coefficient.
Apply this formula: force_z()@BODY / (0.5*density*Velocity^2*Area) I'm new to CFD, I can not plot, I have to do? Sorry my English is not very good many thanks:confused::( 
Define a monitor point with the CEL expression. Then you can see how the drag coefficient moves as the run progresses. Or you can do it in CFDPost.

How do you do the CEL expression??
or How could do it in CFDpost? I can't do this expression, I need you help me, please!!!! 
Put the expression posted above in as a monitor point in a solver run, or put it into the function calculator in CFDPost.

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