RT Journal Article
ID 6608113855d93439
A1 Paschkewitz, J. S.
A1 Smajdek, M. A.
A1 Pratt, David M.
T1 "On-demand" Electrohydrodynamic (EHD) Heat Transfer  Enhancement Using an Anionic Surfactant
JF Journal of Enhanced Heat Transfer
JO JEH(T)
YR 2000
FD 2000-12-01
VO 7
IS 6
SP 385
OP 409
AB Transient heat transfer enhancement performance with electrohydrodynamic (EHD) augmentation was characterized using a single-phase transformer oil in a concentric wire-cylinder test section. Performance using the oil alone was inconsistent, but the addition of an anionic surfactant gave reproducible enhancements with rapid response times. The impact of surfactant concentration on enhancement behavior was investigated in both the transient and steady state regimes. For both high and low concentrations of surfactant additive, current response to step voltage changes occurred within 300 msec, and enhancement response lagged due to the thermal mass of the test article. In the steady state, the high concentration of the additive resulted in a much higher electrical power requirement but gave better enhancement and pressure drop behavior for a given enhancement than the low concentration. Mechanisms for the positive effect of the surfactant additive are analyzed and electrochemical rate constants are obtained. Implications for the design of controllable EHD-enhanced heat transfer systems are articulated.
PB Begell House
LK https://www.dl.begellhouse.com/journals/4c8f5faa331b09ea,15d6757534f5a615,6608113855d93439.html