Numerical Solution of Laminar Jet Mixing with and Without Free Stream


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Systematic numerical solutions of two dimensional and axisymmetrical laminar jet of an incompressible fluid with and without free stream were obtained. The exact numerical solutions were checked with experimental results and similarity solutions for the case without free stream. At far downstream, the numerical solutions approach the values of similarity solution. The numerical solutions give better agreement with experimental data than the similarity solutions. In general, it shows that the boundary layer equation is a good approximation of laminar jet problem provided that the Reynolds number at nozzle exit is not too low. With free stream, the numerical solutions agree with linearized analytic solution if the jet excess velocity is small in comparison with the free stream velocity. The non-linear effects are to decrease the rate of decrease of central velocity of the jet and to broaden the spread of the jet. Also an approximate numerical solution for three dimensional laminar jet is proposed. The accuracy of the method was determined from the exact solutions of the two limiting cases of three dimensional jets, i.e., two dimensional and axisymmetric. It was found that this approximate method may give good results for the axial velocity distribution and the spread of three dimensional jet. (Author).




Masters Theses in the Pure and Applied Sciences


Book Description

Masters Theses in the Pure and Applied Sciences was first conceived, published, and disseminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) * at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all con cerned if the printing and distribution of the volume were handled by an international publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Cor poration of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 26 (thesis year 1981) a total of 11 ,048 theses titles from 24 Canadian and 21 8 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this important annual reference work. While Volume 26 reports theses submitted in 1981, on occasion, certain univer sities do report theses submitted in previous years but not reported at the time.







Report


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NBS Special Publication


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Research in Progress


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