TY  - CONF

JO  - Thermal and Thermomechanical Phenomena in Electronic Systems (ITherm), 2010 12th IEEE Intersociety Conference on
TI  - Convective heat transfer due to an impinging synthetic jet: A numerical investigation of a canonical geometry
T2  - Thermal and Thermomechanical Phenomena in Electronic Systems (ITherm), 2010 12th IEEE Intersociety Conference on
IS  - 
SN  - 1087-9870
VO  - 
SP  - 1
EP  - 8
AU  - Silva, L.A.
AU  - Ortega, A.
Y1  - 2-5 June 2010
PY  - 2010
KW  - Navier-Stokes equations
KW  - convection
KW  - finite volume methods
KW  - jets
KW  - laminar flow
KW  - Navier-Stokes equations
KW  - Reynolds numbers
KW  - canonical geometry
KW  - convection-diffusion equation
KW  - convective heat transfer
KW  - laminar impinging synthetic jet
KW  - oscillation frequencies
KW  - two-dimensional finite volume approach
VL  - 
JA  - Thermal and Thermomechanical Phenomena in Electronic Systems (ITherm), 2010 12th IEEE Intersociety Conference on
DOI  - 10.1109/ITHERM.2010.5501394
AB  - In the present study, a canonical geometry has been created for investigating the flow and heat transfer of a purely oscillatory jet that is not affected by the manner in which it is produced, and hence has allowed us to investigate the flow and heat transfer in a generalized approach. The unsteady Navier- Stokes equations and the convection-diffusion equation were solved using a full unsteady, two-dimensional finite volume approach in order to capture the complex time dependent flow field produced by periodic ejection-suction at high frequencies. The effect of the Reynolds number Re and the jet-to-surface distance H upon the heat transfer were parametrically examined, over a range of oscillation frequencies. Results were compared with a steady, laminar impinging jet of the same configuration, and over the same range, for matched Reynolds numbers Re <; 600. It was found that synthetic and continuous jets are comparable in cooling efficiency, but have dissimilar dependence on jet-to-surface distance. Furthermore, an optimum jet-to-surface distance was indentified for oscillatory jets that does not exist for steady laminar jets.
ER  -