A numerical investigation of 3D fluid flow and heat transfer in a rectangular micro-channel has been carried out using water as cooling silicon substrate. Navier-Stokes energy equations for laminar conjugate are solved finite volume solver. Solutions first carefully validated with available analytical experimental results; the shape is then optimized surrogate methods. Ratios width to depth fin selected design variables. Design points through four-level full factorial design. single...

This paper presents the design optimization of a centrifugal compressor impeller with hybrid multi-objective evolutionary algorithm. Reynolds-averaged Navier—Stokes (RANS) equations are solved shear stress transport turbulence model as closure model. Flow analysis is performed on hexahedral grid through finite-volume solver. Two objectives, viz., isentropic efficiency and total pressure ratio (PR), selected four variables that define hub shroud contours in meridian terms for optimizing...

The shape optimization of a micro-channel heat sink with grooved structure has been performed using multiobjective evolutionary algorithm. thermal-resistance and pumping-power characteristics the have investigated numerically. For optimization, four design variables, i.e., ratios groove depth to height, pitch diameter pitch, width height are selected. thermal resistance pumping power objective functions. Navier-Stokes energy equations for laminar flow conjugate transfer solved finite-volume...

Extensive research has been carried out in order to design a refrigeration system that is efficient and consumes less power. Several researchers have explored various techniques decrease the power usage of compressors increase coefficient performance (COP) systems by utilizing nanoparticles. The remarkable properties nanoparticles, including their exceptional thermo-physical tribological characteristics, made variety thermal applications. This study investigated hydrocarbon blend refrigerant...

This study numerically investigates the impact behavior of conical and blunt projectiles on thin aluminum 2024-T3 plates using ABAQUS. Simulations analyze a 0.82 mm thick plate impacted at velocities from 28 to 100 m/s. Results reveal distinct penetration behaviors: projectile exhibits four-petal failure mode penetrates lower ballistic limit (28.57 m/s), while requires higher velocity (50.44 m/s) forms single plug. Variations in residual velocity, absorbed energy, damage duration highlight...

power are taken as objective functions. Navier–Stokes and energy equations for laminar flow conjugate heat transfer solved analyses using a finite volume solver. Thermal resistance is decreased the Nusselt number increased at expense of pressure drop in ribbed microchannel. channel generally higher than that smooth fixed pumping power, but difference thermal reduces increases. The design variable ratio rib height to width primarily responsible most sensitive augmentation, whereas ratios...

A microchannel heat sink shape optimization has been performed using response surface approximation. Three design variables related to width, depth, and fin width are selected for optimization, thermal resistance taken as objective function. Design points chosen through a three-level fractional factorial of sampling methods. Navier–Stokes energy equations steady, incompressible, laminar flow conjugate transfer solved at these finite volume solver. Solutions carefully validated with the...

Multi-objective shape optimization of a micromixer with staggered herringbone grooves on the top and bottom walls has been performed through three-dimensional Navier–Stokes analysis, surrogate method multi-objective evolutionary algorithm. Mixing index friction factor are selected as objective functions, four design variables, viz., number per half cycle (N), angle groove (θ), depth to channel height ratio (d/h), width pitch (Wd/pi) chosen out various geometric parameters which affect...

Abstract In the present work, influence of stirrer blade design on dispersion reinforcement particles in aluminum metal matrix was studied extensively through experiments and also simulated them using computational fluid dynamics (CFD) method. The microstructure mechanical properties produced composites (MMCs) were studied. analysis performed an optical microscope to visualize distribution binding within matrix. Further, field emission scanning electron (FESEM) X-ray diffraction (XRD) used...

R ECENTLY, casing treatments using grooves or slots have been applied to axial compressors prevent surge and enhance stall margin (SM). However, this is accompanied by a loss near the blade tip region, which leads decrease in efficiency of compressor. Therefore, systematic design treatment multiobjective optimization techniques conjunction with flow analysis three-dimensional Reynolds-averaged Navier– Stokes equations (RANS) was used investigate compromise between SM Various types suggested...

A rotating channel with staggered pin-fins is formulated numerically and optimized for performance (heat transfer/required pumping power) using a Kriging meta-model hybrid multi-objective evolutionary algorithm. Two design variables related to cooling height, pin diameter, spacing between the pins are selected optimization, two-objective functions heat transfer friction loss employed. of experiment performed, 20 designs generated by Latin hypercube sampling. The objective function values...