I'm trying to estimate the drag force of a simple sphere
using FloWorks 2008. The sphere is 0.15m in diameter and the fluid
is water at 278K moving at 1ms-1.

The tutorial about cylinder drag says that you should calculate the 'Component of Force' along a specified axis. If I do this for a sphere, the value is approximately half that which is expected (I've done the calculation by hand). If, however, you calculate the 'Normal Component of Force' as well as the 'Component of Force' and add the two together, you get the right answer.

Why do I have to calculate both these components to get the right answer when the tutorial only specifies one of them?

The tutorial about cylinder drag says that you should calculate the 'Component of Force' along a specified axis. If I do this for a sphere, the value is approximately half that which is expected (I've done the calculation by hand). If, however, you calculate the 'Normal Component of Force' as well as the 'Component of Force' and add the two together, you get the right answer.

Why do I have to calculate both these components to get the right answer when the tutorial only specifies one of them?

With 49 looks at your post and no reply, I'd like you to know that you deserve an explanation. I have a current post that regards actual heat flow proidicted by Flow versus actual field measured values.

IMHO, Flow in their manual and tutorial takes a cookbook approach to the analysis. Just follow the recipe and believe in the results. But when the actual results differ from the analysis.............what do you do???

I think that the problem is that we needed to subscribe to the same thought process that the Flow programmers ascribe to. I think that much more description of the assumptions and method of calculation has to be part of the manual.

The Flow manual provided by SolidWorks is extremely minimal considering the cost of the program.