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ISBN : 978-1-56700-478-6

Proceedings of the 24th National and 2nd International ISHMT-ASTFE Heat and Mass Transfer Conference (IHMTC-2017)
2017, December 27-30 , BITS Pilani, Hyderabad, India

Molecular Investigation towards Electrical Field Assisted Boiling Heat Transfer

Get access DOI: 10.1615/IHMTC-2017.1040
pages 741-746

Abstract

Molecular dynamic simulation tool have been used to study the behaviour of water molecules in electric field assisted boiling. It has been observed that there is a difference in a way the water molecules behave under the effect of positive and negative electric fields. When a positive electric field (1 N/C) is applied the molecules tend to move away from the heated surface similar to rapid boiling, but, a thin film of liquid is seen being attached to the surface even as the rapid boiling progresses. This helps in suppression of formation of vapour layer near the surface. Whereas, a negative electric field (-0.1 N/C) is found to assist nucleate boiling phenomena. To study the effect of varying temperature on electric field induced boiling, simulations have been carried out with two different temperatures (1000 K and 800K). It is intuitionally observed that the vapour bubble grows at a faster rate at high temperatures. A scheme of controlling boiling heat transfer is observed by varying application of electric field temporally which essentially turns on and off the boiling process.
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