Non-Boussinesq effects in free thermal convection.
Non-Boussinesq effects in free thermal convection.
复制标题
DOI：
10.1103/physreva.43.2833
复制
发表时间：
1991-03
期刊：
影响因子：
--
通讯作者：
Wu;Libchaber
中科院分区：
文献类型：
--
作者：
Wu;Libchaber
Rayleigh-B 'enard对流系统中的非Boussinesq效应导致上下边界层之间的对称性破缺。我们发现，这两层会调整它们的温降和厚度，使得它们的温标\ensuremath {\nu}\ensuremath{\kappa}/g\ensuremath{\alpha}${\ensuremath{\lambda}}^{3}$相等，其中\ensuremath{\alpha}是热膨胀系数，g是重力加速度，而\ensuremath{\nu}和\ensuremath{\kappa}分别是运动粘度和热扩散率。
Non-Boussinesq effects in a Rayleigh-B\'enard convection system lead to a symmetry breaking between the top and the bottom boundary layers. We have found that the two layers adjust their temperature drops and the thicknesses \ensuremath{\lambda} such that their temperature scales \ensuremath{\nu}\ensuremath{\kappa}/g\ensuremath{\alpha}${\ensuremath{\lambda}}^{3}$ are equal, where \ensuremath{\alpha} is the thermal expansion coefficient, g is the gravitational acceleration, and \ensuremath{\nu} and \ensuremath{\kappa} are the kinematic viscosity and thermal diffusivity, respectively.