Field Function shows an error

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 September 23, 2011, 02:42 Field Function shows an error #1 New Member   Niaz Ali Ahmed Join Date: Jun 2010 Posts: 14 Rep Power: 9 I am trying to write a vector field function to calculate 17/(Velocity^2) I have tried 17/(pow(\$\$Velocity,2)) 17/(\$\$Velocity*\$\$Velocity) Both have failed. Is this because vector division is not possible, or some other error? However when I use a single dollar Velocity it shows assembly code. Please help me asap.

 September 23, 2011, 04:12 #2 New Member   Jean-François Corbett Join Date: Aug 2011 Posts: 8 Rep Power: 8 There is no such thing as vector division. I'm guessing you want to divide by the magnitude of the velocity vector? STAR-CCM+ provides two ways to calculate the magnitude of a vector: vector magnitude: mag(\$\$u) vector magnitude squared: mag2(\$\$u) So for you, the most straightforward expression is: 17/mag2(\$\$Velocity) For more, see STAR-CCM+ help: Using Tools > Using Field Functions > Field Function Programming Reference > Vector Functions siara817 and Paola like this.

 September 23, 2011, 08:17 #3 New Member   Niaz Ali Ahmed Join Date: Jun 2010 Posts: 14 Rep Power: 9 @jfcorbett Thank you very much. The problem is solved now.

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