Hi We know that mean root square speed in specific perpendicular directions is like this
Vrms^2 = 3 Vrmx_x^2 = 3 Vrmx_y^2 = 3 Vrmx_z^2 What is the relation for the mean linear speed Vavg in specific directions? Could it be like this, that the components can be vector summarized to get the total? Vavg^2 = Vavg_x^2 + Vavg_y^2 + Vavg_z^2 And assuming isotropic distributions (Vavg_x = Vavg_y = Vavg_z) leading to Vavg^2 = 3Vavg_x^2 + Vavg_y^2 + Vavg_z^2 which is like the relation on top. If so then I have to recalculate my gas shear stress derivation on arXiv. But since I am not sure I need some confirmation first. Please help. David David Jonsson, Sweden, phone callto:+46703000370
