Subcooled Pool Boiling Studies on Nano-Textured Surfaces Conference Paper uri icon

abstract

  • Heat transfer in subcooled pool boiling on nano-textured surfaces is reported in this study. Silicon wafers coated with Multiwalled Carbon Nanotubes (MWCNT) forests 9 microns (Type-A), and 25 microns (Type-B) in height and 815 nm in diameter with a randomized pitch of 1630 nm, form the test surfaces. The test fluid is a fluoroinert (PF-5060, Manufacturer: 3M Co.) with a boiling point of 56C. The test rig is of the constant heat flux type. Heat transfer enhancement of approximately 1.3 to 32% is observed in the nucleate boiling regime for Type-A at subcooling levels of 20C. Type-B CNT shows an enhancement of about 1330% in the nucleate boiling regime for 20C subcooling. Digital images acquired during the tests show increased nucleation occurring on surfaces coated with MWCNT. Potential factors that could explain the observed heat transfer enhancement are: the enhanced surface area (nano-fin effect), disruption of the microlayer region in nucleate boiling, an increase in the size of cold-spots and the high thermal conductivity of MWCNT.

name of conference

  • ASME 2007 InterPACK Conference collocated with the ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference

published proceedings

  • ASME 2007 InterPACK Conference, Volume 2

author list (cited authors)

  • Sathyamurthi, V., & Banerjee, D.

citation count

  • 2

complete list of authors

  • Sathyamurthi, Vijaykumar||Banerjee, Debjyoti

publication date

  • January 2007

publisher