On the role of pressure in the theory of MHD equations

Jiří Neustupa, Minsuk Yang

Research output: Contribution to journalArticlepeer-review

Abstract

We consider the system of MHD equations in Ω×(0,T), where Ω is a domain in R3 and T>0, with the no slip boundary condition for the velocity u and the Navier-type boundary condition for the magnetic induction b. We show that an associated pressure p, as a distribution with a certain structure, can be always assigned to a weak solution (u,b). The pressure is a function with some rate of integrability if the domain Ω is “smooth”, see section 3. In section 4, we study the regularity of p in a sub-domain Ω1×(t1,t2) of Ω×(0,T), where u (or, alternatively, both u and b) satisfies Serrin's integrability conditions. Regularity criteria for weak solutions to the MHD equations in terms of [Formula presented] 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 u.

Original languageEnglish
Article number103283
JournalNonlinear Analysis: Real World Applications
Volume60
DOIs
Publication statusPublished - 2021 Aug

Bibliographical note

Funding Information:
The authors would like to thank the anonymous reviewer for his/her valuable comments and suggestions. The first author acknowledges the support of the Grant Agency of the Czech Republic , Grant No. GA19-04243S , and the Academy of Sciences of the Czech Republic ( RVO 67985840 ). The second author has been supported by the National Research Foundation of Korea No. 2016R1C1B2015731 , No. 2015R1A5A1009350 and the Yonsei University, Republic of Korea No. 2019-22-0034 .

Publisher Copyright:
© 2021 Elsevier Ltd

All Science Journal Classification (ASJC) codes

  • Analysis
  • Engineering(all)
  • Economics, Econometrics and Finance(all)
  • Computational Mathematics
  • Applied Mathematics

Fingerprint Dive into the research topics of 'On the role of pressure in the theory of MHD equations'. Together they form a unique fingerprint.

Cite this