Pressure Drag in Linear and Nonlinear Quantum Fluids
| Autor: | T. Winiecki, Jim McCann, Charles S. Adams |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
Condensed Matter::Quantum Gases
D'Alembert's paradox Physics Drag coefficient Statistical Mechanics (cond-mat.stat-mech) Bose gas Condensed Matter::Other FOS: Physical sciences General Physics and Astronomy Drag equation Vortex Physics::Fluid Dynamics Classical mechanics Parasitic drag Drag Aerodynamic drag Astrophysics::Earth and Planetary Astrophysics Condensed Matter - Statistical Mechanics |
| Zdroj: | Physical Review Letters. 82:5186-5189 |
| ISSN: | 1079-7114 0031-9007 |
| DOI: | 10.1103/physrevlett.82.5186 |
| Popis: | We study the flow of a weakly-interacting Bose-Einstein condensate around an obstacle by numerical solution of the Gross-Pitaevskii equation. We observe vortex emission and the formation of bow waves leading to pressure drag. We compare the drag law with that of an ideal Bose gas, and show that interactions reduce the drag force. This reduction can be explained in terms of a `collisional screening' of the obstacle. Comment: 4 pages,4 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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