# How to interpret Forces.dat

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 May 9, 2011, 03:33 How to interpret Forces.dat #1 New Member   Carla Join Date: May 2011 Posts: 1 Rep Power: 0 Hi everyone, I'm working on analyzing the forces which occur on an object standing in a current. Therefore I changed my controlDict to get the Forces.dat. This files includes lots of numbers and I was wondering if someone could help me interpreting them? # Time forces(pressure, viscous) moment(pressure, viscous) 3.0495074 (((0.32540538 -0.0078244099 -0.0007789344) (6.7894943 -0.052924547 -4.4842572)) ((0.0017677939 0.057113061 2.0317881e-05) (0.013213033 1.8573447 0.011517997))) 3.1582778 (((0.30514633 0.0027069022 -0.00077956082) (6.6367396 -0.10194604 -4.8944236)) ((-0.00085246205 0.06008529 1.8713607e-05) (0.0085110664 1.8092805 0.0097297487))) .... After copying everything into Excel it looks a bit better: # Time forces pressure viscous moment pressure viscous 3.0495074 0.32540538 -0.0078244099 -0.0007789344 6.7894943 -0.052924547 -4.4842572 0.0017677939 0.057113061 2.0317881e-05 0.013213033 1.8573447 0.011517997 3.1582778 0.30514633 0.0027069022 -0.00077956082 6.6367396 -0.10194604 -4.8944236 -0.00085246205 0.06008529 1.8713607e-05 0.0085110664 1.8092805 0.0097297487 3.2610254 0.38226206 -0.035842856 -0.00077955302 6.5805845 0.003704612 -4.8783838 0.005028375 0.070154761 2.312134e-05 -0.016757856 1.8145354 -0.0029691682 ... I think that the first column is the time and the second one the force on the defined point. Am I right? Thanks for helping!

May 11, 2011, 08:56
#2
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Join Date: Nov 2009
Location: Germany
Posts: 96
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Quote:
 Originally Posted by stufo I think that the first column is the time and the second one the force on the defined point. Am I right?
Hi,

a force is always acting on a face (not on a point).
But yes, you are right.
Values are in this order:
1. Time
2. pressure force (in X-direction)
3. pressure force (Y)
4. pressure force (Z)
5. viscous force (X)
6. viscous force (Y)
7. viscous force (Z)
8. moment from pressure force (in X-direction)
9. and so on...
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