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Lee, Jae Hwa
Flow Physics and Control Lab
Research Interests
  • Turbulent Flow Physics and Control
  • Incompressible and Compressible Flows
  • Fluid-Structure Interaction
  • Multi-Phase Flow with Heat Transfer


Organized Structure of Turbulent Boundary Layer with Rod-roughened Wall

DC Field Value Language Sung, Hyung Jin ko Lee, Jae Hwa ko Kim, Kyoungyoun ko Sung, Hyung Jin ko 2015-08-05T00:26:34Z - 2015-08-04 ko 2008-06 -
dc.identifier.citation Transactions of the KSME, B, v.32, no.6, pp.463 - 470 ko
dc.identifier.issn 1226-4881 ko
dc.identifier.uri -
dc.identifier.uri ko
dc.description.abstract Turbulent coherent structures near rod-roughened wall are investigated by analyzing the database of direct numerical simulation of turbulent boundary layer. The surface roughness rods with the height k/δ=0.05 are arranged periodically in Reδ=9000. The roughness sublayer is defined as two-point correlations are not independent of streamwise locations around roughness. The roughness sublayer based on the two-point spatial correlation is different from that given by one-point statistics. Quadrant analysis and probability-weighted Reynolds shear stress indicate that turbulent structures are not affected by surface roughness above the roughness sublayer defined by the spatial correlations. The conditionally-averaged flow fields associated with Reynolds shear stress producing Q2/Q4 events show that though turbulent vortices are affected in the roughness sublayer, these are very similar at different streamwise locations above the roughness sublayer. The Reynolds stress producing turbulent vortices in the log layer (y/δ=0.15) have almost the same geometrical shape as those in the smooth wall-bounded turbulent flows. This suggests that the mechanism by which the Reynolds stress is produced in the log layer has not been significantly affected by the present surface roughness ko
dc.description.statementofresponsibility close -
dc.language KOR ko
dc.publisher 대한기계학회 ko
dc.subject Direct numerical Simulation (직접수치모사) ko
dc.subject Turbulent Boundary Layer (난류경계층) ko
dc.subject Surface Roughness (표면조도) ko
dc.subject Turbulent Structure (난류구조) ko
dc.title Organized Structure of Turbulent Boundary Layer with Rod-roughened Wall ko
dc.title.alternative Organized structure of turbulent boundary layer rod roughened-wall ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-45849108343 ko
dc.identifier.wosid ART001253378 ko
dc.type.rims ART ko
dc.description.wostc 0 *
dc.description.scopustc 0 * 2015-08-04 * 2015-11-04 * 2015-11-04 *
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