caa a22 4500 445812117 CHVBK 20180317145215.0 cr unu---uuuuu 170323e20110401xx s 000 0 eng 10.1007/s00419-010-0424-9 doi (NATIONALLICENCE)springer-10.1007/s00419-010-0424-9 Analytical investigation of boundary layer growth and swirl intensity decay rate in a pipe [Elektronische Daten] [Reza Maddahian, Azadeh Kebriaee, Bijan Farhanieh, Bahar Firoozabadi] In this research, the developing turbulent swirling flow in the entrance region of a pipe is investigated analytically by using the boundary layer integral method. The governing equations are integrated through the boundary layer and obtained differential equations are solved with forth-order Adams predictor-corrector method. The general tangential velocity is applied at the inlet region to consider both free and forced vortex velocity profiles. The comparison between present model and available experimental data demonstrates the capability of the model in predicting boundary layer parameters (e.g. boundary layer growth, shear rate and swirl intensity decay rate). Analytical results showed that the free vortex velocity profile can better predict the boundary layer parameters in the entrance region than in the forced one. Also, effects of pressure gradient inside the boundary layer is investigated and showed that if pressure gradient is ignored inside the boundary layer, results deviate greatly from the experimental data. Springer-Verlag, 2010 Analytical solution nationallicence Swirling flow nationallicence Boundary layer integral method nationallicence Swirl intensity decay rate nationallicence Maddahian Reza School of Mechanical Engineering, Sharif University of Technology, Tehran, Iran aut Kebriaee Azadeh School of Mechanical Engineering, Sharif University of Technology, Tehran, Iran aut Farhanieh Bijan School of Mechanical Engineering, Sharif University of Technology, Tehran, Iran aut Firoozabadi Bahar School of Mechanical Engineering, Sharif University of Technology, Tehran, Iran aut Archive of Applied Mechanics Springer-Verlag 81/4(2011-04-01), 489-501 0939-1533 81:4<489 2011 81 419 https://doi.org/10.1007/s00419-010-0424-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00419-010-0424-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Maddahian Reza School of Mechanical Engineering, Sharif University of Technology, Tehran, Iran aut NATIONALLICENCE 700 1- Kebriaee Azadeh School of Mechanical Engineering, Sharif University of Technology, Tehran, Iran aut NATIONALLICENCE 700 1- Farhanieh Bijan School of Mechanical Engineering, Sharif University of Technology, Tehran, Iran aut NATIONALLICENCE 700 1- Firoozabadi Bahar School of Mechanical Engineering, Sharif University of Technology, Tehran, Iran aut NATIONALLICENCE 773 0- Archive of Applied Mechanics Springer-Verlag 81/4(2011-04-01), 489-501 0939-1533 81:4<489 2011 81 419 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer