Spatial transition point from laminar flow to turbulence in a circular pipe with bellmouth inlet by solving a weakly-stochastic navier-stokes equation

Hiroki Kijima, Ken Naitoh, Tomotaka Kobayashi, Yuya Yamashita

研究成果: Conference contribution

抄録

In order to simulate the spatial transition point from laminar flow to turbulence in a closed pipe, we proposed the numerical method called “stochastic determinism” that based on the stochastic Navier-Stokes equation. The important point is that the stochasticity level is decided by inlet disturbance intensity. The finite difference method based on the multi-level formulation is also included which can calculate spatial derivatives of physical quantities and integrated quantities accurately. In this report, an incompressible flow in straight pipe with bellmouth inlet is computed. The difference in transition length between our computation and experimental results by Kanda were reduced by decreasing inlet disturbances in our computation.

本文言語English
ホスト出版物のタイトルAIAA Scitech 2021 Forum
出版社American Institute of Aeronautics and Astronautics Inc, AIAA
ページ1-12
ページ数12
ISBN(印刷版)9781624106095
出版ステータスPublished - 2021
イベントAIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2021 - Virtual, Online
継続期間: 2021 1 112021 1 15

出版物シリーズ

名前AIAA Scitech 2021 Forum

Conference

ConferenceAIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2021
CityVirtual, Online
Period21/1/1121/1/15

ASJC Scopus subject areas

  • Aerospace Engineering

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