M.S. Students

Gihun Shim

20150404_200543

Name

Gihun Shim, 심기훈

Course

M.S. Student (석사과정)

Research Area

To analyze flow patterns related with our environment, especially turbulent flow, we should know characteristic of turbulence from small-scale turbulence to large-scale motions, I have been observing break-up process of transferring energy from large eddies to small eddies such as energy cascade. This break-up process shows propagation of energy by visualizing scale of eddy motions. Especially according to Kolmogorov’s second hypothesis, the statistics of the motion of scale L is uniquely determined by dissipation rate ∈. So, my research is to observe inertial subrange for transfer of energy to successively smaller scales in terms of various point of view such as energy spectrum

사진1

사진2

Email

lingenious2@gmail.com

Entrance date

2015/03

Permanent link to this article: http://euler.yonsei.ac.kr/?p=1292

MyeongHeum Kwon

권명흠

Name

MyeongHeum Kwon, 권명흠

Course

M.S. Student (석사과정)

Research Area

Particle behavior in convective turbulence

Rayleigh-Benard convection is natural convection of fluid within two parallel walls. It is commonly observed in atmospheric flow and industrial fields. At first, the main objective of present study is to obtain information for particle behavior in particle-laden Rayleigh-Benard convection, such as thermal plumes and vortical structures. Secondly the study focus on comparing result of topology of motions in turbulence flow without particles, and with particle laden Rayleigh-Benard convection. This study is simulated by direct numerical simulation using a spectral method. Simulations were conducted with a Rayleigh number 5*10^6    , Prandtl number   0.7   . Periodic boundary condition is applied to two parallel walls, and no-slip condition. So, in this study, the characteristics of Rayleigh-Benard convection are investigated with particle behavior.

 

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Email

ads4807@naver.com

Entrance date

2015/03

Permanent link to this article: http://euler.yonsei.ac.kr/?p=1297

Yeoji Jeong

정여지

Name

Yeoji Jung, 정여지

Course

M.S. Student (석사과정)

Research Area

We can easily find particle laden flows in nature and technology especially focused on fluid dynamics. Two of important problems arise in particle laden turbulence, which are the dispersion of particles by turbulence and turbulence modification by particles. When the effects of particle presence are not negligible, this phenomena are called two-way coupling interaction. The purpose of my study is to reveal two-way interaction with gravity in particle laden isotropic turbulence by researching the previous works further. The leading researchers show that particle clustering caused by gravity in one-way coupled, turbulence properties are not modified by the presence of particles,particle laden isotropic turbulence. For an advanced study, I consider the effect of fluid on particle as well as the inverse and gravity effect. I use direct numerical simulation (DNS) to examine particle distribution at different kinds of Stokes numbers and the other physical quantities to compare with.

정여지-researchEmail

green5441@naver.com

Entrance date

2014/03

Permanent link to this article: http://euler.yonsei.ac.kr/?p=1041