最近30从www.hoelymoley.com 2023 - 04 - 02 - t09:29:41z //www.hoelymoley.com/feeds/question/16613 https://creativecommons.org/licenses/by-sa/4.0/rdf //www.hoelymoley.com/q/16613 4 安德斯·桑德伯格 //www.hoelymoley.com/users/12421 2019 - 03 - 31 - t12:40:51z 2019 - 04 - 01 - t01:05:10z

< p >条件对流停止是瑞利数<跨类= " math-container " > $ $ \ mathrm {Ra} = \压裂{g \ \ραL ^ 3 \δT} {\ kappa \ν}\ lessapprox 10 ^ 3。$ $ < / span >的地幔我见过估计美元< span class = " math-container " > \ mathrm {Ra} \大约10 ^ 6 $ < / span > <跨类= " math-container " > 10 ^ 8美元< / span >,这天真地将意味着我们需要减少< span class = " math-container " > \δT < / span >美元倍< span class = " math-container " > 10 ^ 3美元< / span > <跨类= " math-container " > 10 ^ 5美元< / span >对流停止。在现实中这是一个高估自热膨胀<跨类= " math-container " > \α< / span >,美元的热扩散率<跨类= " math-container " > \ kappa < / span >美元,特别是粘度<跨类= " math-container " > \ν< / span >美元是依赖于温度的。< / p > < p >然而,作为一个non-geologist我很难找到简单功能形式的文学,因为他们的这些参数也依赖于其他一些压力和经验不确定性大。有什么规范估计必要的温差,或定性模型吗? < / p >

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