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Studies on mathematical structure of boundary value problems appearing in hydrodynamics and magnetohydrodynamics

Research Project

Project/Area Number 15K04957
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Mathematical analysis
Research InstitutionNara Women's University

Principal Investigator

YANAGISAWA Taku  奈良女子大学, 自然科学系, 教授 (30192389)

Project Period (FY) 2015-04-01 – 2018-03-31
Project Status Completed (Fiscal Year 2017)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2015: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords境界値問題 / MHD方程式 / 安定性 / Hodge分解 / 調和ベクトル場 / Navier-Stokes方程式 / MHD / 自由境界 / Nash-Moser型陰関数定理 / 定常解 / 自由境界問題
Outline of Final Research Achievements

This research was intended as an attempt to study the relations, from a mathematical standpoint, between the following three issues on the boundary value problems appearing in the hydrodynamics and magnetohydrodynamics (MHD) : (i) the nonlinear structure of equations, (ii) the setting of boundary conditions, (iii) the geometrical structure of domains. Our results obtained in this reserach can be listed below.
(1) We proved the existence and the stability of weak solutions of stationary MHD equations under inhomogeneous boundary conditions.(2) We gave a characterization of harmonic vector fields in three dimensional exterior domain by topological invariants of exterior domains. This result shall be a base for establishing Hodge decomposition theorem for exterior domains.

Report

(4 results)
  • 2017 Annual Research Report   Final Research Report ( PDF )
  • 2016 Research-status Report
  • 2015 Research-status Report
  • Research Products

    (5 results)

All 2018 2017 2016 2015

All Presentation (4 results) (of which Int'l Joint Research: 3 results,  Invited: 4 results) Funded Workshop (1 results)

  • [Presentation] Characterization of the space of harmonic vector fields over exterior domains2018

    • Author(s)
      Taku Yanagisawa
    • Organizer
      The 35th Kyushu Symposium on Partial Differential Equations
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 外部領域上の調和ベクトル場のなす空間について2017

    • Author(s)
      柳沢卓
    • Organizer
      第6回岐阜数理科学研究会
    • Related Report
      2017 Annual Research Report
    • Invited
  • [Presentation] On the existence and stability of stationary solutions of MHD equations under the inhomogeneous boundary conditions2016

    • Author(s)
      Taku Yanagisawa
    • Organizer
      The Navier Stokes Equations and Related Topics -In Honor of the 60th Birthday of Professor Reinhard Farwig-
    • Place of Presentation
      Nagoya University, Japan
    • Year and Date
      2016-03-10
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] On the stability of stationary solutions to the MHD equations with large boundary data2015

    • Author(s)
      Taku Yanagisawa
    • Organizer
      RIMS Workshop on Mathematical Analysis in Fluid and Gasdynamics
    • Place of Presentation
      RIMS, Kyoto University, Kyoto, Japan
    • Year and Date
      2015-07-09
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research / Invited
  • [Funded Workshop] Free Boundary Problems in Fluid and Plasma Dynamics2016

    • Place of Presentation
      Department of Mathematics, Nara Women's University
    • Year and Date
      2016-02-03
    • Related Report
      2015 Research-status Report

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Published: 2015-04-16   Modified: 2019-03-29  

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