Oscillatory Electrohydrodynamic Gas Flows

Lai, F. C.; McKinney, P.J.; Davidson, Jane H.

doi:10.1115/1.2817289

Cited by 47 publications

(8 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The effect of corona wind produced by a needle electrode with either polarity seems to be able to sustain at a higher velocity of cross-flow. This finding agrees very well with the results reported by Lai et al [15] as well as Yamamoto and Velkoff [17] that the secondary flow induced by corona wind is suppressed and confined to a smaller region near the wall when the velocity of cross-flow increases.…”

Section: Ehd-enhanced Water Evaporation 605supporting

confidence: 90%

“…Since the corona wind velocity u e is difficult to measure directly and accurately without a special instrument, [14] its value is calculated based on the measured corona current as suggested from the previous study. [15] Since the corona current increases with the applied voltage, it is clear from the above definition that the EHD Reynolds number also increases with the applied voltage. For experiments conducted in the absence of cross-flow, the result is presented in Fig.…”

Section: Resultsmentioning

confidence: 97%

See 1 more Smart Citation

EHD-Enhanced Water Evaporation

2004

Self Cite

View full text Add to dashboard Cite

The enhancement of water evaporation by electrostatic field (corona wind) has been experimentally evaluated in this study. Two sets of experiments were conducted, with and without cross-flow, at an increment of 1 kV from the corona threshold voltage until the occurrence of sparkover. Two types of electrodes (wire and needle) were used. In addition, both positive and negative corona discharges were applied. The weight loss of water due to evaporation as well as the ambient temperature and humidity were measured. For each case a companion experiment was carried out simultaneously under the same ambient conditions but without the application of electric field. The result of which is used as a basis in the evaluation of the evaporation enhancement using electric field. Each experiment lasted for at least 5 h. With the application of electric field alone, the ORDER REPRINTS enhancement in the water evaporation rate increases with the applied voltage. With the introduction of cross-flow, the enhancement in the evaporation rate becomes nearly independent of the applied voltage and is close to the result obtained with cross-flow alone.

show abstract

Section: Ehd-enhanced Water Evaporation 605supporting

confidence: 90%

Section: Resultsmentioning

confidence: 97%

EHD-Enhanced Water Evaporation

2004

Self Cite

View full text Add to dashboard Cite

show abstract

“…In the traditional FDM, the central difference scheme is used for the electric potential and the backward difference scheme is used for the gradient of the space-charge density [1][2][3][4][5][6][7][8] as follows:…”

Section: Traditional Finite Difference Methods and Its Limitationmentioning

confidence: 99%

“…However, all these authors used two-dimensional, symmetric domains [1][2][3][4][5][6][7][8], but did not investigate if these assumptions were reasonable. Nor did they consider why the calculation domain had to be the first quadrant of single discharge electrode or why the forward difference scheme could not be applied to get the space-charge density gradient in the traditional FDM.…”

Section: Introductionmentioning

confidence: 99%

Applications of upwind and downwind schemes for calculating electrical conditions in a wire–plate electrostatic precipitator

Lei

Wang

2004

Journal of Computational Physics

View full text Add to dashboard Cite

“…Studies on the oscillating flow generated by EHD pumping remain scarce, whereas the unidirectional flow generation induced by EHD pumping at AC and DC voltages has been investigated extensively (5), (6) . The existence of EHD induced oscillatory gas flow was revealed only recently (7) . Lai and Matthew (8) predicted the effect of EHD-induced oscillatory gas flows on heat transfer.…”

Section: Introductionmentioning

confidence: 99%

Development of an Electrohydrodynamic (EHD) Micropump to Generate Oscillating Flow at Low Frequencies

Fujiwara

Kano

Takahashi

2010

JAMDSM

View full text Add to dashboard Cite

An electrohydrodynamic (EHD) micropump to generate oscillating flow is newly developed and experimentally tested using an arrangement of thin stainless steel wires. A working fluid is accelerated from the charged electrode to the ground electrode by a high electric field. The electric body force responsible for this acceleration is primarily the Coulomb force. To increase the electric filed, the distance between the charged and ground electrodes is 0.2 mm. The size of the present EHD pump is 24×30×7.8 mm. Since the pressure increases with the increase in the number of the electrode pairs, a pumping channel fabricated in this EHD pump is bent in parallel so as to increase the number of electrode pairs. This channel has the dimensions of 24×48×0.9 mm, in which ten pairs of electrodes are fabricated. The maximum static pressure generated by the present EHD pump is approximately 550 Pa at an input of DC 1 kV, and the maximum flow rate is 4.3 ml/min at the unloaded condition. In order to generate symmetric oscillating flows, alternating voltage is applied. The present EHD pump is demonstrated to successfully generate symmetric oscillating flows at low frequencies (0.01 Hz ~ 0.05 Hz)

show abstract

Oscillatory Electrohydrodynamic Gas Flows

Cited by 47 publications

References 9 publications

EHD-Enhanced Water Evaporation

EHD-Enhanced Water Evaporation

Applications of upwind and downwind schemes for calculating electrical conditions in a wire–plate electrostatic precipitator

Development of an Electrohydrodynamic (EHD) Micropump to Generate Oscillating Flow at Low Frequencies

Contact Info

Product

Resources

About