Abnormal enhancement of separated turbulent air flow and heat transfer in inclined single-row oval-trench dimples at the narrow channel wall

2019 ◽  
Vol 163 ◽  
pp. 202-207 ◽  
Author(s):  
Sergey Isaev ◽  
Mikhail Gritckevich ◽  
Аlexandr Leontiev ◽  
Igor Popov
Keyword(s):  
Heat Transfer ◽  
Channel Wall ◽  
Air Flow ◽  
Narrow Channel ◽  
Single Row ◽  
Flow And Heat Transfer ◽  
Turbulent Air Flow

scholarly journals Numerical and experimental study of abnormal enhancement of separated turbulent flow and heat transfer in inclined oval-trench dimples on the plate and on the narrow channel wall

2021 ◽  
Vol 2039 (1) ◽  
pp. 012009
Author(s):  
S A Isaev ◽  
S V Guvernyuk ◽  
N I Mikheev ◽  
I A Popov ◽  
D V Nikushchenko
Keyword(s):  
Heat Transfer ◽  
Channel Wall ◽  
Separated Flow ◽  
Narrow Channel ◽  
State University ◽  
Scientific Center ◽  
Pressure Drops ◽  
Nusselt Numbers ◽  
Flow And Heat Transfer ◽  
Numerical Predictions

Abstract The numerically found abnormal enhancement of separated flow and heat transfer in inclined oval-trench dimples (OTDs) on the plate and on the wall of the narrow channel was experimentally confirmed at the stands of the Research Institute of Mechanics (Lomonosov Moscow State University), the Kazan Scientific Center RAS, and the Kazan State Research Technical University – the Kazan Aviation Institute. The measured static pressure drops in a single OTD at Re = 6.7 × 104 and 16.7 × 104, the velocity profiles of accelerating laminar (Re = = 1000) and turbulent (Re = 4300) flows in the narrow channel with two rows of 26 OTDs, the estimate of Nusselt numbers on the channel wall with single-row OTDs are in good agreement with the numerical predictions within the RANS approach.

Numerical Analysis of Impinging Air Flow and Heat Transfer in Plate-Fin Type Heat Sinks

1999 ◽  
Vol 123 (3) ◽  
pp. 315-318 ◽  
Author(s):  
Keiji Sasao ◽  
Mitsuru Honma ◽  
Atsuo Nishihara ◽  
Takayuki Atarashi
Keyword(s):  
Heat Transfer ◽  
Thermal Conductivity ◽  
Numerical Analysis ◽  
Numerical Method ◽  
Heat Sink ◽  
Flow Resistance ◽  
Air Flow ◽  
Heat Sinks ◽  
Flow And Heat Transfer ◽  
Conventional Methods

A numerical method for simulating impinging air flow and heat transfer in plate-fin type heat sinks has been developed. In this method, all the fins of an individual heat sink and the air between them are replaced with a single, uniform element having an appropriate flow resistance and thermal conductivity. With this element, fine calculation meshes adapted to the shape of the actual heat sink are not needed, so the size of the calculation mesh is much smaller than that of conventional methods.

Jet vortex heat transfer in turbulent air flow around a plate with a slit rib

2020 ◽  
Vol 146 ◽  
pp. 118867 ◽  
Author(s):  
Dehai Kong ◽  
V.N. Afanasiev ◽  
S.A. Isaev ◽  
D.V. Nikushchenko
Keyword(s):  
Heat Transfer ◽  
Air Flow ◽  
Turbulent Air Flow
Sign in / Sign up

Export Citation Format

Share Document