@Article{LimaSiStCaVaMaMi:2003:MeMaDi,
               author = "Lima, J. A. P. and Silva, M. G. da and Sthel, M. S. and Cardoso, 
                         S. L. and Vargas, H. and Marin, E. and Miranda, Luiz Carlos 
                         Moura",
          affiliation = "Universidade Estadual do Norte Fluminense, Centro de Ci{\^e}ncia 
                         e Tecnologia and {Universidade Estadual do Norte Fluminense} and 
                         {Universidade Estadual do Norte Fluminense} and {Universidade 
                         Estadual do Norte Fluminense} and {Universidade Estadual do Norte 
                         Fluminense} and {Universidad de La Habana} and {Instituto Nacional 
                         de Pesquisas Espaciais (INPE)}",
                title = "Measurement of mass diffusivity in air using thermal wave 
                         interference detection",
              journal = "Review of Scientific Instruments",
                 year = "2003",
               volume = "74",
               number = "1",
                pages = "433--436",
                month = "Jan.",
             keywords = "resonator cavity, sensor,vapor.",
             abstract = "A discussion on the use of the thermal wave interference (TWI) for 
                         the monitoring of the transient of hydrocarbon in air is 
                         presented. The thermal wave signal was modeled using the 
                         logarithm-mixing model for the thermal diffusivity of a two-phase 
                         gas system in which the hydrocarbon vapor concentration in the 
                         air-filled TWI cell is a varying function of time. The time 
                         varying hydrocarbon vapor concentration was described assuming the 
                         simple Fick's model for mass diffusion of the hydrocarbon vapor in 
                         the stagnant air column of the TWI cell. The transient TWI signal 
                         amplitude data fitting yielded two parameters, namely, the 
                         saturation concentration and the characteristic diffusion time. 
                         From the corresponding values of the diffusion time the 
                         hydrocarbon mass diffusivities were straightforwardly obtained.",
           copyholder = "SID/SCD",
                  doi = "10.1063/1.1520331",
                  url = "http://dx.doi.org/10.1063/1.1520331",
                 issn = "0034-6748",
             language = "en",
           targetfile = "1.1520331.pdf",
                  url = "http://dx.doi.org/10.1063/1.1520331",
        urlaccessdate = "20 maio 2024"
}