On weak solutions of nonstationary boussinesq equations

Yoshiyuki Kagei

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)


We study weak solutions of the initial and boundary value problems of the Boussinesq equations which describe the natural convection in a viscous incompressible fluid. We construct a global weak solution for the initial velocity in L2 and the initial temperature in L1. We show that the temperature θ(x, t) of our weak solution is Hölder continuous in x for almost every t > 0. In general, it is not known whether weak solutions are unique or not. We show that weak solutions are unique if they are in some Lebesgue space. We show, moreover, that weak solutions are regular if they belong to the uniqueness class.

Original languageEnglish
Pages (from-to)587-611
Number of pages25
JournalDifferential and Integral Equations
Issue number3
Publication statusPublished - 1993

All Science Journal Classification (ASJC) codes

  • Analysis
  • Applied Mathematics


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