网站首页  情感咨询  情感美文  情感百科  情感生活  学习充电  旧版美文

请输入您要查询的词汇:

 

词汇 Lundquist number
分类 英语词汇 英语翻译词典
释义

Lundquist number

英语百科

Lundquist number

In plasma physics, the Lundquist number (denoted by S) is the dimensionless ratio of an Alfvén wave crossing timescale to a resistive diffusion timescale. In SI units, it is given by

There is an error in the formula, the right one is : S=L*Va/n

where L is a typical length scale, \mu_0 is the permeability of free space, V_A=\frac{B}{\sqrt{\mu_0 n_0 m_i}} is the Alfvén speed for a plasma with magnetic field B, density n_0, ion mass m_i and \eta is the plasma resistivity. High Lundquist numbers indicate highly conducting plasmas, while low Lundquist numbers indicate more resistive plasmas. Laboratory plasma experiments typically have Lundquist numbers between 10^2-10^8, while in astrophysical situations the Lundquist number can be greater than 10^{20}. Considerations of Lundquist number are especially important in magnetic reconnection.

随便看

 

依恋情感网英汉例句词典收录3870147条英语例句词条,基本涵盖了全部常用英语单词的释义及例句,是英语学习的有利工具。

 

Copyright © 2004-2024 Yiyi18.com All Rights Reserved
京ICP备2021023879号 更新时间:2025/8/8 18:48:26