(4.2.1)--2.9Thevelocitycomponentandthespe.pdf
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1、The velocity component and the speed distribution relative to the most probable speed Sometimes we need to calculate the number of molecules or the probability when the component of velocity or the speed of the molecule is in some interval.And then we can make a substitution for the Maxwell velocity
2、 distribution or the speed distribution making it into the form of the velocity component distribution or the speed distribution relative to the most probable speed.2d()1exp()dxxxN uuuN21/2d()()d()expd22xxxxxNmmfNkTkTvvvvv1.The velocity component distribution relative to the most probable speed vpxx
3、pu vvSet to ddxpxuv=vThe velocity component distribution relative to the most probable speed If the ratio of the number of molecules whose velocity component in x direction being less than a certain value of vx is required,the above formula can be integrated200(0)d()1()exp()dxxuxxxxNNuuNNvvv202erf()
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