@Article{CristaldoVargFach:2015:EfPrEf,
               author = "Cristaldo, Cesar F. C. and Vargas, Maycol Marcondes and Fachini 
                         Filho, Fernando",
          affiliation = "{Universidade Federal do Pampa (UNIPAMPA)} and {Instituto Nacional 
                         de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)}",
                title = "Ferrofluid droplet vaporization under very large magnetic power: 
                         effects of pressure and effective thermal conductivity of liquid",
              journal = "Proceedings of the Combustion Institute",
                 year = "2015",
               volume = "35",
               number = "2",
                pages = "1613--1620",
             keywords = "Ferrofluid, Magnetic relaxation heating, Magnetic nanoparticle, 
                         Droplet combustion.",
             abstract = "The aim of current analysis is to quantify the influence of the 
                         effective thermodynamic and transport coefficients and of the 
                         transient process of mass and energy accumulation in the gas phase 
                         (pressure effect) on the heating and vaporization of a single 
                         ferrofluid droplet. Ferrofluids under external alternating 
                         magnetic field heat up themselves due to the magnetic Brownian 
                         relaxation mechanism. Under the condition of very large magnetic 
                         power compared to the thermal power provided by heat transfer from 
                         the gas phase, the magnetic heat source together with the heat 
                         transfer from the gas phase impose a thermal boundary layer 
                         adjacent to the droplet surface in the liquid side and the 
                         temperature presents a maximum inside the droplet, not at the 
                         surface. Since the transport coefficient increases significantly 
                         with a dispersion of a small quantity of nanoparticles, the heat 
                         transfer from the thermal boundary layer to the droplet core 
                         increases. Then the temperature of that region increases faster 
                         comparing to the case without nanoparticle dispersion. The 
                         temperature inside the thermal boundary layer increases slower 
                         because of the heat transfer to the droplet core as well as to the 
                         droplet surface. Therefore, the boiling condition which is found 
                         inside the thermal boundary layer is reached later when 
                         considering effective thermal conductivity. The droplet 
                         vaporization rate is augmented by the heat transfer from the 
                         thermal boundary layer to the droplet surface. In addiction, the 
                         strong dependence of the magnetic relaxation mechanism on 
                         temperature imposes a dependence of the vaporization rate on the 
                         initial condition of the problem.",
                  doi = "10.1016/j.proci.2014.06.009",
                  url = "http://dx.doi.org/10.1016/j.proci.2014.06.009",
                 issn = "1540-7489",
             language = "en",
           targetfile = "cristaldo_ferrofluid.pdf",
        urlaccessdate = "27 abr. 2024"
}