Thermal Creep Coefficient

The thermal creep coefficient Gt in both channel and tube is given by... 

The thermal creep coefficient Gj is also obtained from the Navier-Stokes equation, but applying the thermal slip botmdary condition (9). It is verified that this coefficient does not depend on the type of the cross section in... 

Gas Flow In Nanochannels, Fig. 3 Thermal creep coefficient versus rarefaction parameter 6 solid lines, kinetic equation solution [11] pointed line, free-molecular value based on Eqs. 12 and 15 dashed line, Navier-Stokes solution Eq. 19... 

Numerical results on the capillary flow of polyatomic gases can be found in [4]. Comparing these results with the data presented here, it is concluded that the Poiseuille coefficient Gp is slightly affected by the internal structure of molecules. The thermal creep coefficient Gp for polyatomic gases differs from that for monatomic gases. 

Thermal creep coefficient determines a gas flow induced by a temperature gradient... 

Several BGK analyses have been performed for the thermal-creep coefficient [2.99]. The only BGK analysis of the near-free-molecular regime thermal force (Kn. 1, Kn - 0) appears to be that of BROCK [2.136], Experimental Millikan-cell data were found by SCHMITT [2.97] and others to follow the relation... 

Here Cs. "t, and x are microscopic constants Cs. >. and t are called the slip coefficient, the thermal creep coefficient, and the temperature jump distance, respectively. All four constants have the dimension of a length and their... 

Note that if the super-index ch or tb is omitted the quantity is referred to both channel and tube. The coefficient Gj describes a gas flow due to a temperature gradient and it is called the thermal creep coefficient. The coefficients Gp and Gt are introduced so that they are always positive. They are calculated from the kinetic equation and determined by the rarefaction parameter... 

Gas Flow In Nanochannels, Table 3 Thermal creep coefficient 6 vs. accommodation coefficients at and an [14]... 

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