Nonlinear Analysis: Real World Applications ( IF 2 ) Pub Date : 2021-01-15 , DOI: 10.1016/j.nonrwa.2020.103283 Jiří Neustupa , Minsuk Yang
We consider the system of MHD equations in , where is a domain in and , with the no slip boundary condition for the velocity and the Navier-type boundary condition for the magnetic induction . We show that an associated pressure , as a distribution with a certain structure, can be always assigned to a weak solution . The pressure is a function with some rate of integrability if the domain is “smooth”, see section 3. In section 4, we study the regularity of in a sub-domain of , where (or, alternatively, both and ) satisfies Serrin’s integrability conditions. Regularity criteria for weak solutions to the MHD equations in terms of are studied in section 5. Finally, section 6 contains remarks on analogous results in the case of Navier’s or Navier-type boundary conditions for the velocity .
中文翻译:
压力在MHD方程理论中的作用
我们考虑了MHD方程组 ,在哪里 是一个域 和 ,对于速度没有滑动边界条件 和磁感应的Navier型边界条件 。我们证明了相关的压力作为具有特定结构的分布,可以始终分配给一个弱解 。压力是具有一定可积率的函数,如果域 是“平滑的”,请参见第3节。在第4节中,我们研究了 在子域中 的 ,在哪里 (或者 和 )满足Serrin的可积性条件。关于MHD方程的弱解的正则性准则 在第5节中进行了研究。最后,第6节包含了关于速度的Navier或Navier型边界条件的类似结果的说明 。