Reply To: Why Negative Moment – Wind Turbine – & Residuals

[Nate K.]

 

Is that the only criteria, residual dropping below 1e-3, when looking at the residual picture above, that you are using to conclude it has not converged? 

Moment:

I am not sure what I am doing — or what Fluent is doing — regarding summing the moment on the blades… does Fluent automatically do this with the way I have created the “turbine”? And for whatever it’s worth, I have not created blade faces that I am aware of… I simply created a named selection in Fluent Mesh called “Turbine” using the edges of the three airfoils (edges not faces). Then, when opening Fluent, in the 6DOF settings I set “Turbine” to rotate. Or are we talking about the same thing… edge, face… just depends if looking at it as 2D or 3D I suppose…

I have not checked for area/vector definitions… havent heard of this before. 

I am not sure how the speed is defined… in other words, I have not changed anything that I know of… I simply chose a constant wind speed of 8m/s at the inlet of flow area…