Numerical Simulation of Non-isothermal Turbulent Flow in a Pipe with Rheology Newtonian and Viscoplastic Fluid | Chapter 10| Research and Developments in Engineering Research Vol. 5

 This unit aims to investigate the flow and heat transfer in a fierce hydrodynamically steady-state firm non-Newtonian fluid flowing through a pipe. This study concede possibility be of interest to scientists and research engineers handling the design and transport of waxy raw oils in pipelines. Rheological properties of the fluid are defined by the Herschel–Bulkley model, that implies an unyielded domain formation in the flow. Viscous amusement effects and hotness dependence of the stickiness are taken into report when simulating the process. The value of allure streamwise velocity in the main zone raised significantly when the fluid proposed along the pipe. On the other hand, it shoot in the vicinity of the obstruction, and the height of the domain with nothing fluid velocity red-pink. This happened on account of a non-Newtonian fluid's viscoplastic characteristics. The complicatedness of the numerical forming of such flows related to the developed agitation models can hardly be confirmed directly utilizing the experimental criterion. It should be famous that the level of turbulence anisotropy of a non-Newtonian fluid is above that of a Newtonian fluid. The height of the domain with a nothing fluid velocity in the pipe raised gradually as the non-Newtonian fluid (pliable crude oil) transported through the pipe. A noticeable increase in the level of unsettled kinetic energy in the principal zone of the pipe and allure noticeable decrease in allure near-wall domain were observed. In the mathematical layer, the speed profile for the non-Newtonian fluid had a form qualitatively related to that of the Newtonian fluid. An excess of the in the middle velocity was characteristic for two together types of non-Newtonian fluids with a mathematical profile.

Author(s) Details:

Maksim A. Pakhomov,
Laboratory of Thermal and Gas Dynamics, Kutateladze Institute of Thermophysics, Siberian Branch of the Russian Academy of Science, Lavrent'ev Avenue, 1, 630090, Novosibirsk, Russia.

Uzak K. Zhapbasbayev,
K.I. Satbayev Kazakh National Research Technical University, 050013, Satpaev str., 22a, Almaty, Kazakhstan.

Please see the link here: https://stm.bookpi.org/RADER-V5/article/view/11091