Discrete tracer point method to evaluate turbulent diffusion in circular pipe flow

Arif Widiatmojo, Kyuro Sasaki, Widodo Nuhindro Priagung, Yuichi Sugai

研究成果: Contribution to journalArticle査読

抄録

Diffusion of a solute in turbulent flows through a circular pipe or tunnel is an important aspect of environmental safety. In this study, the diffusion coefficient of turbulent flow in circular pipe has been simulated by the Discrete Tracer Point Method (DTPM). The DTPM is a Lagrangian numerical method by a number of imaginary point displacement which satisfy turbulent mixing by velocity fluctuations, Reynolds stress, average velocity profile and a turbulent stochastic model. Numerical simulation results of points’ distribution by DTPM have been compared with the analytical solution for turbulent plug-flow. For the case of turbulent circular pipe flow, the appropriate DTPM calculation time step has been investigated using a constant β, which represents the ratio between average mixing lengths over diameter of circu- lar pipe. The evaluated values of diffusion coefficient by DTPM have been found to be in good agreement with Taylor’s analytical equation for turbulent circular pipe flow by giving β = 0.04 to 0.045. Further, history matching of experimen- tal tracer gas measurement through turbulent smooth-straight pipe flow has been presented and the results showed good agreement.
本文言語英語
ページ(範囲)57-68
ページ数12
ジャーナルJournal of Flow Control, Measurement & Visualization
2013
1
DOI
出版ステータス出版済み - 7 2013

All Science Journal Classification (ASJC) codes

  • Fluid Flow and Transfer Processes

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