Subsonic flow past localised heating elements in boundary layers

The problem of subsonic flow past micro-electro-mechanical-system-type (MEMS-type) heating elements placed on a flat surface, where the MEMS devices have hump-shaped surfaces, is investigated using triple-deck theory. The compressible Navier–Stokes equations supplemented by the energy equation are c...

Full description

Saved in:
Bibliographic Details
Published in:Journal of fluid mechanics 2017-06, Vol.821, Article R2
Main Authors: Aljohani, A. F., Gajjar, J. S. B.
Format: Article
Language:English
Subjects:
Boundary conditions
Boundary element method
Boundary layer
Boundary layers
Compressibility
Computational fluid dynamics
Decks
Devices
Energy equation
Fluid flow
Fluid mechanics
Heating
Mathematical models
Microelectromechanical systems
Navier-Stokes equations
Nonlinear analysis
Rapids
Reynolds number
Skin
Skin friction
Studies
Subsonic flow
Triple-deck theory
Velocity
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The problem of subsonic flow past micro-electro-mechanical-system-type (MEMS-type) heating elements placed on a flat surface, where the MEMS devices have hump-shaped surfaces, is investigated using triple-deck theory. The compressible Navier–Stokes equations supplemented by the energy equation are considered in the limit that the Reynolds number is large. The triple-deck problem is formulated, and the linear and nonlinear analysis and results are presented. The current work is a generalisation of the problem discussed by Koroteev & Lipatov (J. Fluid Mech., vol. 707, 2012, pp. 595–605; Z. Angew. Math. Mech., vol. 77, 2013, pp. 486–493), where the MEMS devices have flat-shaped surfaces. The results show that the hump-shaped heating elements enhance large drops in pressure, and peaks and troughs in the skin friction over the centre of the hump compared with the flat-shaped devices, which may be useful for controlling the flow.
ISSN:0022-1120
1469-7645
DOI:10.1017/jfm.2017.277