2026-03-11T10:10:47Z https://jaxa.repo.nii.ac.jp/oai

oai:jaxa.repo.nii.ac.jp:00031274 2023-06-21T01:05:26Z 1887:1890 1896:1898:1899:1991

Numerical Study of the Entrance Flow and its Transition of a Circular Pipe KANDA, H. OSHIMA, K. Two-dimensional, time-dependent computational scheme has been devised for determining the flow development and the corresponding pressure drop in the entrance region of a circular pipe at the Reynolds numbers based on the pipe diameter of 10,100,2000,and 10000. An iterative, stream function-vorticity formulation was applied, utilizing a mesh system in which the axial grid size is nearly proportional to the Reynolds number. The velocity field, the pressure drop, and the convective and the viscous terms are compared with the experimental results and also with the previous analysis. Moreover, the effects of the Reynolds number and the superposed disturbances on the transition from laminar to turbulent flow were numerically simulated. 資料番号: SA0033535000 宇宙科学研究所 Institute of Space and Astronautical Science 1986-03 eng departmental bulletin paper https://jaxa.repo.nii.ac.jp/records/31274 0288-433X AA10455137 The Institute of Space and Astronautical Science report. S.P. : Proceedings of the Symposium on Mechanics for Space Flight 1985 4 71 87 https://jaxa.repo.nii.ac.jp/record/31274/files/SA0033535.pdf application/pdf 807.6 kB 2020-01-23