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		<citationkey>LeiteSant:2009:DiSiCa</citationkey>
		<title>Direct simulation calculations of the rarefied hypersonic flow past a backward-facing step</title>
		<year>2009</year>
		<secondarytype>PRE CI</secondarytype>
		<numberoffiles>1</numberoffiles>
		<size>1244 KiB</size>
		<author>Leite, Paulo Henrique Mineiro,</author>
		<author>Santos, Wilson Fernando Nogueira,</author>
		<group>LCP-CTE-INPE-MCT-BR</group>
		<group>LCP-CTE-INPE-MCT-BR</group>
		<affiliation>Instituto Nacional de Pesquisas Espaciais (INPE)</affiliation>
		<affiliation>Instituto Nacional de Pesquisas Espaciais (INPE)</affiliation>
		<e-mailaddress>ignes@lcp.inpe.br</e-mailaddress>
		<conferencename>Brazilian Symposium on Aerospace Engineering and Applications, 2009; CTA-DLR Workshop on Data Analysis and Flight Control, 3.</conferencename>
		<conferencelocation>São José dos Campos, SP</conferencelocation>
		<date>14-16 sept.</date>
		<publisher>ITA</publisher>
		<publisheraddress>São José dos Campos</publisheraddress>
		<booktitle>Proceedings</booktitle>
		<tertiarytype>Paper</tertiarytype>
		<organization>ITA/DLR</organization>
		<transferableflag>1</transferableflag>
		<contenttype>External Contribution</contenttype>
		<keywords>hypersonic flow, rarefied flow, dsmc, backward-facing step.</keywords>
		<abstract>Abstract. This work deals with a numerical study on backward-facing steps situated in a rarefied hypersonic flow. The work is motivated by the interest in investigating the step height on the flowfield structure. The primary aim of this paper is to examine the sensitivity of the velocity, density, pressure and temperature due to step-height variations of such backwardfacing steps. Effects on the flowfield structure due to variations on the step height have been investigated by employing the Direct Simulation Monte Carlo (DSMC) method. The analysis showed that the flow past a backward-facing step in hypersonic flow is characterized by a strong expansion around de corner of the step, which influences the downstream separation region. It was found that the recirculation region behind of the steps is a function of the rear-face height. The analysis also showed that changing the height of the step did not affect the flow upstream of it. However, disturbances downstream the step depend on changes in the rear-face height of the steps.</abstract>
		<area>COMB</area>
		<language>en</language>
		<targetfile>direct.pdf</targetfile>
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