A Theoretical and Experimental Investigation of the Effect  of Surface and Flow Conditions on Nucleate and Transition   Boiling
{'Code': '07020000', 'Directorate': {'Abbreviation': 'ENG', 'LongName': 'Directorate For Engineering'}, 'Division': {'Abbreviation': 'CBET', 'LongName': 'Div Of Chem, Bioeng, Env, & Transp Sys'}}
{'SignBlockName': 'George P. Peterson', 'PO_EMAI': None, 'PO_PHON': None}
An Analytical and experimental study of fully developed nucleate                and transition boiling under pool and forced flow conditions on a               vertical surface is proposed.  A three region model of boiling                  forms the basis of the theoretical effort.  An analysis will be                 carried out for each of the three regions, namely, the wall                     region, the intermediate region, and the vapor flow dynamics                    dominated region.  Experiments will be conducted on surfaces                    having different degrees of wettability and roughness.  The size                distribution of cavities on the surface will be determined with                 an electron microscope and generalized Weierstrass type of                      functions will be developed for the surface.  The experiments                   will be conducted with saturated water.  In the flow boiling                    experiments, the void fraction will be varied from 0 to 20                      percent.  The experimental work will be complementary to the                    analytical effort.                                                                                                                                              When completed, the study will allow a nearly theoretical                       prediction of fully developed nucleate and transition boiling                   heat fluxes as a function of wall superheat.  The input to the                  model will be the surface wettability, the cavity size                          distribution function, the fluid thermophysical properties, and                 geometrical and flow conditions.  The study will pave the way for               carrying out a standard problem.  It will also guide the                        development of two-tiered surfaces for passive enhancement of                   heat fluxes over the complete range of nucleate boiling.
{'FirstName': 'Vijay', 'LastName': 'Dhir', 'PI_MID_INIT': 'K', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Vijay K Dhir', 'EmailAddress': 'vdhir@seas.ucla.edu', 'NSF_ID': '000344858', 'StartDate': '01/15/1989', 'EndDate': None, 'RoleCode': 'Principal Investigator'}
{'Name': 'University of California-Los Angeles', 'CityName': 'LOS ANGELES', 'ZipCode': '900244200', 'PhoneNumber': '3107940102', 'StreetAddress': '10889 WILSHIRE BLVD STE 700', 'StreetAddress2': None, 'CountryName': 'United States', 'StateName': 'California', 'StateCode': 'CA', 'CONGRESSDISTRICT': '36', 'CONGRESS_DISTRICT_ORG': 'CA36', 'ORG_UEI_NUM': 'RN64EPNH8JC6', 'ORG_LGL_BUS_NAME': 'UNIVERSITY OF CALIFORNIA, LOS ANGELES', 'ORG_PRNT_UEI_NUM': None}
{'Name': None, 'CityName': None, 'StateCode': None, 'ZipCode': None, 'StreetAddress': None, 'CountryCode': None, 'CountryName': None, 'StateName': None, 'CountryFlag': None, 'CONGRESSDISTRICT': None, 'CONGRESS_DISTRICT_PERF': '""'}
{'Code': '1406', 'Text': 'TTP-Thermal Transport Process'}
{'url': 'https://www.nsf.gov/awardsearch/download?DownloadFileName=1988&All=true', 'xml': '8821447.xml'}