The micro heat spreader (MHS) is a micro-fluidic device designed for thermal management of microelectronic components. It connects two reservoirs by a set of micro-channels (Fig. 1). The bottom surfaces of the reservoirs are membranes that are driven with a phase difference of π, either by electrostatic or piezoelectric actuation. The idea is to minimize the chip surface temperature by oscillatory flow forced convection and mixing. Numerical simulations are performed for an MHS device with channel to reservoir expansion ratio The boundary conditions and the MHS geometry are shown in Fig. 2. Both the flow and temperature fields are time-periodic, and Womersley and Prandtl numbers are α=5.6. and respectively. Since the temperature field closely follows the flow. Figs. 3(a–d) show snapshots of temperature contours during ejection to the right reservior, where shear layer instability at the channel expansion is observed. The vortex rolls due to the shear layer instability are visible in the temperature contours of Figs. 3 (b, c). The flow rapidly turns towards the oscillating membrane due to the influence of the end wall and the membrane motion. The temperature contours show two primary counter-rotating zones with various smaller rotating structures, which promote further mixing in the MHS system.
Skip Nav Destination
Article navigation
Heat Transfer Photogallery
SHEAR LAYER INSTABILITY AND MIXING IN MICRO HEAT SPREADERS
C. Sert and,
C. Sert and
Texas A&M University, Micro-Fluidics Laboratory, College Station, Texas
Search for other works by this author on:
A. Beskok
A. Beskok
Texas A&M University, Micro-Fluidics Laboratory, College Station, Texas
Search for other works by this author on:
C. Sert and
Texas A&M University, Micro-Fluidics Laboratory, College Station, Texas
A. Beskok
Texas A&M University, Micro-Fluidics Laboratory, College Station, Texas
J. Heat Transfer. Aug 2001, 123(4): 621 (1 pages)
Published Online: August 1, 2001
Citation
Sert and , C., and Beskok , A. (August 1, 2001). "SHEAR LAYER INSTABILITY AND MIXING IN MICRO HEAT SPREADERS ." ASME. J. Heat Transfer. August 2001; 123(4): 621. https://doi.org/10.1115/1.1385892
Download citation file:
Get Email Alerts
Cited By
On Prof. Roop Mahajan's 80th Birthday
J. Heat Mass Transfer
Thermal Hydraulic Performance and Characteristics of a Microchannel Heat Exchanger: Experimental and Numerical Investigations
J. Heat Mass Transfer (February 2025)
Related Articles
Investigation of Surface Convection Enhancement by a V-Formation Winglet Array Using Infrared Thermography
J. Heat Transfer (August,2011)
On Preferred Perturbations Selected by Centrifugal Instability
J. Fluids Eng (September,2001)
Heat Transfer Past a Rotationally Oscillating Circular Cylinder in Linear Shear Flow
J. Heat Transfer (July,2022)
Heat Transfer Augmentation Through Wall-Shape-Induced Flow Destabilization
J. Heat Transfer (May,1990)
Related Chapters
Cavitating Structures at Inception in Turbulent Shear Flow
Proceedings of the 10th International Symposium on Cavitation (CAV2018)
Numerical Simulations of Tip Leakage Vortex Cavitation Flows Around a NACA0009 Hydrofoil
Proceedings of the 10th International Symposium on Cavitation (CAV2018)
On the Dispersion Relation of a Vortex Cavity
Proceedings of the 10th International Symposium on Cavitation (CAV2018)