Brief information about the project AP14972680

Taylor-Couette flow of yield-stress fluids

Project name:

Taylor-Couette flow of yield-stress fluids

Report:

This research project is a fundamental study in the field of fluid mechanics with a high degree of implementation at an industrial level. The current study looks at the flow of fluid between coaxial cylinders, called the Taylor-Couette flow. One example of using the results of this flow study is the slurry flow during the cementing process of an oil well. As far as I know, the level of study of this flow of fluid is very low, despite the very high level of interest. As mentioned above, current research focuses on analyzing the Taylor-Cowett flow stability through the fluid flow threshold. It is planned to use both theoretical and experimental approaches. In theory, it is necessary to analyze linear and weak nonlinear stability in order to have an idea of the basic parameters of Flow Control and take into account the nonlinear effects of the determining Law of flow structure in Taylor’s vortex flow regime (Taylor-Vortex flow regime – TVF). For these purposes, a specific model is used and compared, which is implemented using the augmented Lagrange method and the ordered Model. On the other hand, in the second and third year of the project, experimental works planned in collaboration with the lemta Laboratory (University of Lorraine, Nancy, France) using modern equipment and methods such as “particle imaging speed” measurements (PIV) and visual experiments.

This project has two main goals:

• first, identify the physical mechanisms and determine the effect of a stationary layer that occurs in the area near the outer wall;
  secondly, determine the influence of geometric parameters of the system on the stability of the flow. These results give us a good idea of the processes within the equipment and /or during various production processes. The information provided makes it possible to increase the efficiency of using special equipment in industry, as well as the methodology of relevant processes.

Purpose of the project:The main goal of the current study is to analyze the influence of a stationary part of the liquid (solid region) on the stability of the Taylor-Cowet current, the physics of the current phenomenon and the mechanisms associated with it using theoretical and experimental approaches.

Expected results: Previous research ended with the publication of two journal articles in the first quartile (Q1) and in the percentile above 75. Therefore, for current research, it is expected that at least two articles will be published in highly rated journals in the field of fluid mechanics. The novelty and application of this project presupposes a high potential even after the end of this program. Currently, the current project plans to participate in at least two international conferences (International Congress of rheology in Athens, July 2023 and international congress on theoretical and Applied Mechanics 2024, South Korea) to confirm the results. As stated in fundamental terms at the beginning of this project, current research can be used as a basis in the study of the transition to turbulence. Again, this study is at the intersection of fields such as physics, chemistry and mathematics, since it contains an explanation of the physical mechanisms of various processes on a micro and macro scale, a chemical description of the fluids used and all the theory and assumptions that are built using current mathematical models. In addition, close cooperation with the University of Lorraine (including the lemta laboratory) may continue after the end of this program and may be useful for improving our educational and research programs and structures.