Abstract
This research aims at development of a three dimensional Lagrangian stochastic process model of a particle-pair for predicting the statistics of the scalar fluctuation diffusion field in a non -stationary homogeneous turbulence. In this paper, the three-dimensional stochastic particle-pair model for stationary homogeneous turbulence has been improved so that it is applicable to the non-stationary case. Main points of improvement are as follows; (1) The temporal Lagrangian variation of the velocity fluctuation scale σv is incorporated into the Ito's stochastic equation. (2) The effective sphere of the two-particle velocity correlation has been modeled. As a simple example to which this new model can be applied, the scalar fluctuation field of a point source plume in decaying grid-generated turbulence was simulated. The improved model gives a better prediction of the actual scalar fluctuation properties than stationary homogeneous models.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
