author = "Sebasti{\~a}o, Israel B. and Santos, Wilson Fernando Nogueira 
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)}",
                title = "Numerical simulation of heat transfer and pressure distributions 
                         in micronozzles with surface discontinuities on the divergent 
              journal = "Computers and Fluids",
                 year = "2014",
               volume = "92",
                pages = "125--137",
             keywords = "Direct simulation Monte Carlo method, DSMC, Micronozzle, Rarefied 
                         flow, Simulation of heat transfer, Surface quantities, Thermal and 
                         mechanical loads, Two-dimensional numerical simulation, MEMS, 
                         Monte Carlo methods, Numerical models, Supersonic flow, 
                         Thermodynamics, Computer simulation.",
             abstract = "This work describes two-dimensional numerical simulations of 
                         rarefied gas flows in convergent-divergent micronozzles. 
                         Array-arranged micronozzles with rectangular cross-section and 
                         convex-concave divergent shape are considered. The primary goal of 
                         this paper is to assess the sensitivity of the pressure, skin 
                         friction and heat transfer coefficients as well as the impact on 
                         the specific impulse due to the presence of surface 
                         discontinuities on the divergent contour of the micronozzles. The 
                         knowledge of thermal and mechanical loads present on the 
                         micronozzle surfaces is essential to predict operational 
                         conditions of a propulsive system. Because of the rarefied nature 
                         observed in micronozzle flows and the ability to deal with complex 
                         geometries, the Direct Simulation Monte Carlo method is employed 
                         to simulate the flow structure. For the conditions investigated, 
                         the computational results indicate a small dependence of the 
                         surface aerothermodynamic loads on the divergent curvature. On the 
                         other hand, these loads were strongly affected by the existence of 
                         singularities on the divergent contour, e.g., sharp corners. In 
                         spite of these findings, the specific impulse computed along the 
                         exit section was essentially the same for all investigated 
                  doi = "10.1016/j.compfluid.2013.12.023",
                  url = "http://dx.doi.org/10.1016/j.compfluid.2013.12.023",
                 issn = "0045-7930",
                label = "scopus 2014-05 Sebasti{\~a}oSant:2014:NuSiHe",
             language = "en",
           targetfile = "1-s2.0-S004579301300515X-main.pdf",
                  url = "http://dx.doi.org/10.1016/j.compfluid.2013.12.023",
        urlaccessdate = "29 nov. 2020"