Browsing by Author "KOUACHE Aimene"

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    Assessment of the best turbulence model for simulating thermal performance in shell and tube heat exchangers with different tube bundles
    (NATIONAL HIGHER SCHOOL OF TECHNOLOGY AND ENGINEERING -ANNABA, 2024) KOUACHE Aimene; NIOU Slimane (Encadrant)
    Shell and tube heat exchangers are widely used in various industries for efficient heat transfer between two fluids with different temperatures. The efficiency of heat transfer in these exchangers is strongly influenced by flow regime: i) laminar flow or ii) turbulent flow. The complex geometry, flow conditions, and heat transfer requirements of shell and tube heat exchangers contribute to the prevalence of turbulent flow, making it the dominant flow regime in these devices. Therefore, accurate modeling of turbulence is crucial for understanding and predicting the thermal performance of shell and tube heat exchangers. Turbulence modeling studies aim to investigate and predict the behavior of turbulent flow and heat transfer in these heat exchangers. The end of studies project aims to assess the effectiveness of three commonly used turbulence models - the k-ω model, the k-ε model, and the Realizable model - in simulating the thermo-fluidic performance of a shell and tube heat exchanger. The heat exchanger will be examined with various tube geometry configurations, including circular tubes, 90° elliptical tubes, and combined tube bundle configurations. The primary objective of this study is to identify the most suitable turbulence model for accurately predicting the thermo-fluidic behavior of the heat exchanger under different operating conditions. To achieve this, an in-depth analysis will be conducted using Computational Fluid Dynamics (CFD) methodology to simulate fluid flow through the heat exchanger.
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    Experimental investigation of a 3D printed miniature centrifugal pump operatd by non- contact magnetic actuation
    (NATIONAL HIGHER SCHOOL OF TECHNOLOGY AND ENGINEERING -ANNABA, 2024) KOUACHE Aimene; NIOU Slimane (Encadrant)
    In this engineering final project, we focus on the design, manufacturing, commissioning, and optimization of a miniature centrifugal pump, created via 3D printing. This device is specifically tailored for millifluidic and microfluidic applications, presenting significant challenges in terms of design, manufacturing, and actuation. The design phase began with the creation of a detailed digital model of the pump components using the SolidWorks design software. Subsequently, the parts were manufactured using an Anycubic 3D printer, providing optimal precision and flexibility in creating the complex elements of the pump. The pump's mobile rotor includes an integrated turbine and magnet, printed to ensure free mobility. This choice enables efficient magnetic drive of the pump, ensuring reliable operation and increased durability under various fluidic conditions. The commissioning of the pump will involve thorough experimental testing to evaluate its performance, particularly in terms of flow rate, generated pressure, and energy efficiency. These experimental tests will play a crucial role in the final optimization of the device, aiming to maximize its performance and meet the specific requirements of microfluidic and millifluidic applications.