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 -