Abstract
A direct simulation Monte Carlo method has been developed and applied for the simulation of a supersonic Ar gas expansion through a converging-diverging nozzle, with the stagnation pressures of P0 = 0.1-10 atm, at various temperatures. A body-fitted coordinate system has been developed that allows modeling nozzles of arbitrary shape. A wide selection of nozzle sizes, apex angles, with diffuse and specular atomic reflection laws from the nozzle walls, has been studied. The results of nozzle simulation were used to obtain a scaling law P0T019/8dαLn β = const. for the constant mean cluster sizes that are formed in conical nozzles. The Hagena's formula, valid for the conical nozzles with a constant length, has further been extended to the conical nozzles with variable lengths, based on our simulation results.
| Original language | English |
|---|---|
| Pages (from-to) | 283-288 |
| Number of pages | 6 |
| Journal | Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms |
| Volume | 202 |
| DOIs | |
| Publication status | Published - Apr 2003 |
| Externally published | Yes |
| Event | 6th International Conference on Computer Simulation of Radiation - Dresden, Germany Duration: Jun 23 2002 → Jun 27 2002 |
Keywords
- Body-fitted coordinate
- Cluster size
- Direct simulation Monte Carlo
- Supersonic nozzle
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Instrumentation