if cfgDam.getboolean("projectVelocity"):
        # project velocity on inclined plane
        dataIniV = DFAtls.scalProd(dataIniVx, dataIniVy, dataIniVz, np.cos(phiRad), 0, -np.sin(phiRad))
        dataV = DFAtls.scalProd(dataVx, dataVy, dataVz, np.cos(phiRad), 0, -np.sin(phiRad))
    else: