[adilarvind]

I am writing an expression CFX which includes angular velocity ( i will give it as input when setting up the simulation )
the expression is tc =(8*torque_y()@R1 Blade)/(1.225*(Angular Velocity)^2*(0.3^5))

But whenever i am giving it as monitor point, it shows error :Non-scalar variable 'Angular Velocity' referenced by parameter 'Expression Value' in object '/FLOW:Flow Analysis 1/OUTPUT CONTROL/MONITOR OBJECTS/MONITOR POINT:tcc'.
Non-scalars are only allowed as arguments to integrated quantity functions.

i can define the angular velocity as fixed value and it works, but i want it to take from my input.
What is wrong here? please suggest

[Gert-Jan]

Did you try areaAve(Angular Velocity)@R1 Blade

[adilarvind]

No, it does not work

[Opaque]

There is some confusion here.

The CFX expression language cannot access values from the parametes provided, i.e. you are trying to access the domain angular velocity. It only access from a list of variables which are categorized as field variabels or single valued variables (see install_dir/etc/VARIABLES or documentation)

If you want to centralize your input, you should create a variable and later used elsewhere, i.e.

MyAngularVelocity = 100 [rpm]

Then use

DOMAIN:
DOMAIN MOTION:
Option = Rotating
Angular Velocity = MyAngularVelocity
END
END

Then

tc =(8*torque_y()@R1 Blade)/(1.225*(MyAngularVelocity)^2*(0.3^5))

Also, Angular Velocity is a CEL provided variable for rigid body model. This may be why the message is even more confusing because the variable exists, but it is not the one you expect it.

[adilarvind]

Yes, i understand it, Thanks for the reply.
i found out other way what i was intended to do.

[Mazze[ITA]]

Personally I sorted out the problem moving from Wall Shear to sqrt(Wall Shear X^2 + Wall Shear Y^2 + Wall Shear Z^2)