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- - **How to calculate and write out transient drag / lift coefficient in OpenFOAM 2.2.1?**
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How to calculate and write out transient drag / lift coefficient in OpenFOAM 2.2.1?It seems that a keyword
functions containing forces and forcesCoeffs should be added at the end of controlDict.Is there any tutorial to give a typical example, and what's the meaning of each entry. These two are founded on OpenFOAM forum. Code:
`functions` Code:
`functions` |

execFlowFunctionObjectsi use execFlowFunctionObjects but i have this problem
Time = 0.0008 Reading phi Reading U Reading p Selecting incompressible transport model Newtonian Selecting LES turbulence model oneEqEddy Selecting LES delta type smooth Selecting LES delta type cubeRootVol --> FOAM Warning : From function cubeRootVolDelta::calcDelta() in file cubeRootVolDelta/cubeRootVolDelta.C at line 52 Case is 2D, LES is not strictly applicable |

Lift and dragThere's in OF a function object that allows to evaluate lift and drag?...not coefficient.
Thank's in advance for your attention |

Hi fluxent
type this inside functions () in controlDict forces { type forces; functionObjectLibs ("libforces.so"); patches (//patches of wall you are calculating); pName p; UName U; rhoName rhoInf;//for incompressible rhoInf 1.2; // Reference density, fluid CofR (0 0 0); // Origin for moment calculations outputControl timeStep; outputInterval 1; } You can find in tutorials/incompressible/pimpleDyMFoam/wingMotion/ |

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