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Application of BGK Collision Operator for Kinetic Correction of Fluid Models

✍ Scribed by Yu. L. Igitkhanov; A. S. Kukushkin; A. M. Runov; R. Chodura

Publisher
John Wiley and Sons
Year
1994
Tongue
English
Weight
229 KB
Volume
34
Category
Article
ISSN
0005-8025

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✦ Synopsis

A new approach for modeling kinetic effects in tokamak edge plasma has been recently developed [l]. This approach is based on the modified Bhatnagar, Gross and Krook equations (BGK) instead of the complicate Fokker-Planck (FP) equation and is very simple and convenient for efficient computation. The main idea is to employ two BKG equations for distribution functions, weighted with different powers of the velocity. The relaxation times for these moments are not necessarily equal. This provides enough adjustable parameters for correct transition to the fluid limit.

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