出口での圧力と速度の非一様性を考慮したストークス自由噴流の理論とCFD検証

DOI Web Site

書誌事項

タイトル別名
  • Theory and CFD-Verification of Stokesian Free Jet with Nonuniform Exit Pressure and Velocity

抄録

<p>Jet with Re ≪ 1 is observed downstream of valves in lymphatic vessels of mice and it is an impending research target in developing treatment of noninvasive cancer, especially breast cancer. The jet has the characteristic that the pressure and velocity greatly vary at the exit because of flows with angle change of ninety degree at the exit periphery. A new theory of Stokesian free jet is presented as a model of the jet from a lymphatic valve to predict the pressure in the jet region. Navier-Stokes equations and continuity equation, expressed by the spherical coordinates, are solved under the Stokes approximation by taking radial pressure and velocity variations at the exit into account. Flow field is divided into two regions by the hemisphere with its origin at the exit center and the exit radius, inner region and outer one. The former is inside the hemisphere and the latter is outside it. The pressures in both regions are given by Legendre polynomials, multiplied by powers of the radial distance, and the velocity components are expanded by two series of unknown functions of the angle, multiplied by the powers of the distance. The pressure gradient and the stream lines in the outer-region solutions are patched with those in the inner-region one over the hemisphere, resulting in reasonable solutions in forms of infinite series for the pressures and the velocities. Numerical examples show nonuniformities of the exit pressure and velocities.</p>

収録刊行物

  • 年次大会

    年次大会 2021 (0), S055-34-, 2021

    一般社団法人 日本機械学会

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ