Vol.3, No 12, 2002 pp. 365-370
UDC 533.6
LOW MACH NUMBER, HIGH ORDER RAREFIED GAS
FLOW IN MICRO-CHANNELS
Nevena Stevanović, Vladan D. Djordjević
Faculty of Mechanical Engineering, 27. Marta 80, 11120 Belgrade, Yugoslavia
Isothermal rarefied gas flow in micro-channels of slowly varying cross
section is treated in this paper. It is assumed that the ratio of the reference
Mach number square and the reference Reynolds number is a small quantity,
so that inertia can be neglected and the effect of viscosity is spread
over the whole cross-section of the channel. Higher order slip boundary
condition on the wall is used for the solution of governing equations.
Gas rarefaction leads to increase of mass flow rate for the same inlet
and outlet pressure ratio.
Key words: micro-channels, rarefied gas flow, higher order slip
boundary condition.
STRUJANJE GASOVA U MIKRO-KANALIMA
PRI MALIM VREDNOSTIMA MAHOVOG BROJA, KORIŠĆENJEM
GRANIČNIH USLOVA KLIZANJA VIŠEG REDA
U radu se tretira izotermsko strujanje razređenog gasa u mikro-kanalima
promenljivog poprečnog preseka. Pretpostavlja se da je odnos kvadrata Mahovog
broja i Rejnoldsovog broja mali, tako da se inercioni članovi u osnovnim
jednačinama mogu zanemariti, a uticaj viskoznosti je dominantan u celom
preseku kanala. Koriste se granični uslovi klizanja gasa na zidu višeg
reda i pokazuje da razređenost gasa dovodi do povećanja masenog protoka
pri istom odnosu ulaznog i izlaznog pritiska.
