Fluid mechanics question--slip boundary condition for gas?

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SUMMARY

The discussion focuses on the slip boundary condition for gas flow in the context of the Navier-Stokes equations. It highlights that, contrary to the no-slip condition typically applied at solid surfaces, gaseous flows exhibit a non-zero velocity near the wall, particularly at higher Knudsen numbers. The user specifically seeks resources on the slip velocity of nitrogen gas at Knudsen numbers ranging from 0.07 to 0.1. Recommendations for relevant literature or papers are requested to deepen understanding of this phenomenon.

PREREQUISITES
  • Understanding of the Navier-Stokes equations
  • Familiarity with the concept of Knudsen number
  • Knowledge of boundary layer theory
  • Experience with fluid dynamics principles
NEXT STEPS
  • Research slip boundary conditions in gas dynamics
  • Study the impact of Knudsen number on flow behavior
  • Explore literature on nitrogen gas slip velocity
  • Investigate computational fluid dynamics (CFD) tools for simulating slip conditions
USEFUL FOR

Fluid dynamics researchers, mechanical engineers, and anyone studying gas flow behavior in relation to boundary conditions and Knudsen number effects.

Yinxiao Li
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In solving the Navier Stokes equation, the typical boundary condition imposed on the tangential velocity at a solid surface is that of no-slip. However, it is known that for gaseous flow there always exists a non-zero velocity near the wall, especially at relatively big Knudsen number.
Is there any good book/paper that I can get such information? In particular, I am interested in the slip velocity of nitrogen gas at Kn=0.07~0.1.
Thanks!
 
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