Loading...
Please wait, while we are loading the content...
Similar Documents
An experimental and theoretical investigation of rare$ed gas %ow through circular tube of $nite length
| Content Provider | Semantic Scholar |
|---|---|
| Author | Shinagawa, Hideo Setyawan, Heru Asai, Takuya Sugiyama, Yuuichi Okuyama, Kikuo |
| Copyright Year | 2002 |
| Abstract | The conductance of nitrogen gas through circular tube of $nite length was measured in the continuum and transition regimes for length to diameter ratios L=D ranging from 0.045 to 33.4 and pressure ratios across the tubes P1=P2 from 1.1 to 23. A numerical analysis was carried out to estimate the conductance using the continuum approach in the continuum regime and transition regime at low Knudsen number, and using direct simulation Monte Carlo (DSMC) method in the transition regime at high Knudsen number. The observed conductances were compared with the simulation and an empirical equation derived by Hanks–Weissberg. Both the experimental and simulation results show that the conductances at a constant gas %ow rate increases linearly with increasing arithmetic mean pressure across the tube Pav =( P1 + P2)=2, irrespective of the P1=P2 ratio. The observed conductances were smaller than those predicted by the Hanks–Weissberg’s equation. The deviation increases with increasing gas %ow rate, and with decreasingL=D ratio. It was con$rmed that the deviation occurs due to the increase in the e=ects of inertia and expansion in the %owing gas with increasing %ow rate and decreasing L=D. A semi-empirical equation was derived by substituting the Poiseuille term in the Bernoulli formula with Hank–Weissberg’s equation under the condition of isothermal expansion. The proposed equation was found to be valid in the range of the continuum regime to the transition regime at low Knudsen number. ? 2002 Elsevier Science Ltd. All rights reserved. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://personal.its.ac.id/files/pub/1126-heru-che-CES024027_211002heru.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
