#### Name

Hyoeun Shim, 심효은

#### Course

M.S. Candidate (석사과정)

#### Research Area

prettypitt@naver.com

#### Entrance date

2018/03

**Permanent link to this article: **http://euler.yonsei.ac.kr/?p=1692

Donghwi Kim, 김동휘

Master Student.(석사과정)

The particle-laden environmental flow has emerged as a major issue in the air pollution problem. To solve the problem of air pollution, we need to simulate the particle-laden turbulent flow with computational fluid dynamics using the supercomputing technology. According to the size of particle and density ratio between particle and fluid, the flow can be affected by solid-particle feedback force. This is what we call the two-way particle-laden flow. If the turbulent model to be analyzed is an atmospheric environment with little or no friction at the surface of the earth, we can interpret it as isotropic turbulence. Dealing with the small-scale turbulent motion in homogeneous and isotropic turbulence, we use the DNS (Direct Numerical Simulation) using the pseudo spectral method. These turbulent model is is described both in the physical space and in the wavenumber space.

Under the condition of two-way particle-laden Isotropic turbulence, the Lagrangian point-particle field gives the Eulerian fluid field the feedback force under assumption particle in cell approximation. Lagrangian point-particles can change dissipation rate, kinetic energy, enstropy and energy spectrum as well as the flow field. Especially, when the gravitational effect exists in high density of particle volume fraction, that puts another complexion on the matter.

The purpose of my basic research is what figure out the characteristics of two-way particle-laden turbulent motion according to real to computational particle number as the stokes number and volume fraction and settling velocity are changed

ehdgnl3939@nate.com

2015/09

**Permanent link to this article: **http://euler.yonsei.ac.kr/?p=1366