Pool and flow boiling of novel heat transfer fluids from nanostructured surfaces

Sathyanarayana, Aravind

Title:

Pool and flow boiling of novel heat transfer fluids from nanostructured surfaces

dc.contributor.advisor	Joshi, Yogendra
dc.contributor.author	Sathyanarayana, Aravind
dc.contributor.committeeMember	Teja, Amyn
dc.contributor.committeeMember	Ghiaasiaan, Mostafa
dc.contributor.committeeMember	Graham, Samuel
dc.contributor.committeeMember	Bhavnani, Sushil
dc.contributor.department	Mechanical Engineering
dc.date.accessioned	2014-01-13T16:47:22Z
dc.date.available	2014-01-13T16:47:22Z
dc.date.created	2013-12
dc.date.issued	2013-10-11
dc.date.submitted	December 2013
dc.date.updated	2014-01-13T16:47:22Z
dc.description.abstract	Steadily increasing heat dissipation in electronic devices has generated renewed interest in direct immersion cooling. The ideal heat transfer fluid for direct immersion cooling applications should be chemically and thermally stable, and compatible with the electronic components. These constraints have led to the use of Novec fluids and fluroinerts as coolants. Although these fluids are chemically stable and have low dielectric constants, they are plagued by poor thermal properties. These factors necessitate the development of new heat transfer fluids with improved heat transfer properties and applicability. Computer Aided Molecular Design (CAMD) approach was used in this work to systematically design novel heat transfer fluids that exhibit significantly better properties than those of current high performance electronic coolants. The candidate fluids generated by CAMD were constrained by limiting their boiling points, latent heat of vaporization and thermal conductivity. The selected candidates were further screened using a figure of merit (FOM) analysis. Some of the fluids/additives that have been identified after the FOM analysis include C₄H₅F₃O, C₄H₄F₆O, C₆H₁₁F₃, C₄ H₁₂O₂Si, methanol, and ethoxybutane. The heat transfer performance of these new fluids/fluid mixtures was analyzed through pool boiling and flow boiling experiments. All the fluid mixtures tested showed an improvement in the critical heat flux (CHF) when compared to the base fluid (HFE 7200). A pool boiling model was developed using the phase field method available in COMSOL. Although these simulations are computationally expensive, they provide an alternate solution to evaluate several candidate fluids generated using the CAMD approach.
dc.description.degree	Ph.D.
dc.format.mimetype	application/pdf
dc.identifier.uri	http://hdl.handle.net/1853/50299
dc.language.iso	en_US
dc.publisher	Georgia Institute of Technology
dc.subject	Pool boiling
dc.subject	Flow boiling
dc.subject	Phase field method
dc.subject	Nanostructures
dc.subject.lcsh	Heat Transmission
dc.subject.lcsh	Nanostructured materials
dc.subject.lcsh	Heat-transfer media
dc.subject.lcsh	Fluids Thermal properties
dc.title	Pool and flow boiling of novel heat transfer fluids from nanostructured surfaces
dc.type	Text
dc.type.genre	Dissertation
dspace.entity.type	Publication
local.contributor.advisor	Joshi, Yogendra
local.contributor.corporatename	George W. Woodruff School of Mechanical Engineering
local.contributor.corporatename	College of Engineering
relation.isAdvisorOfPublication	63ef328b-076b-44b7-92a9-0f7dd03fa1fa
relation.isOrgUnitOfPublication	c01ff908-c25f-439b-bf10-a074ed886bb7
relation.isOrgUnitOfPublication	7c022d60-21d5-497c-b552-95e489a06569
thesis.degree.level	Doctoral