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This paper focuses on the research of motile microorganism rates in the bioconvective Oldroyd-B nanoliquid flow over a vertical stretching sheet with mixed convection and inclined magnetic field. Additionally, interesting characteristics of thermophoresis, Brownian motion, viscous dissipation, Joule heating, and stratification are examined. Similarity transformations are employed to reduce the mathematical model to higher-order ODE. The convergent serious solution is applied to solve the nonlinear differential system. The analysis of temperature, velocity, motile microorganisms’ density, and nanoparticle concentration are represented through graphs. Local Nusselt number, density number of motile microorganisms, and Sherwood number are examined via contour plots.

This experimental study is paying attention to the fresh, mechanical, and durability performance of the self-compacting concrete containing fly ash and silica fume. Sixteen different sets of ternary blended self-compacting concrete of M30 grade are prepared as per Indian (IS: 10262-2019) [21] and European (EFNARC - 2005) [14] standards. To investigate the fresh properties (filling ability, flow ability, and segregation resistance), tests such as V- funnel test, V- funnel T5 minutes test, L- box test, slump flow test, and T500 mm slump flow time test were conducted. The compressive strength test, splitting tensile strength test, flexural strength test, and modulus of elasticity test were conducted to assess the mechanical properties of the SCC. Water absorption test, porosity, alkalinity test, acid resistance test, sulphate resistance test, salt-water resistance test and rapid chloride permeability test (RCPT) were conducted to evaluate the durability properties of the SCC. The results indicated that the fresh characteristics of ternary blended self-compacting concrete were gradually decreased when SCMs (fly ash and silica fume) replacement increases. The mechanical characteristics of ternary blended SCC were greater than that of the NSCC up to a certain limit of replacement. The durability properties of SCC were enhanced when replaced with SCMs.

Fiber Reinforced Concrete FRC can be used for a variety, of applications. Fibers are utilized in concrete crack requiring reduction of physical property protection, drying reduction and improved strength and toughness, increased service life and decrease bleeding from water, concrete permeability, and construction value. The utilization of sisal, a natural fiber with increased mechanical efficiency, as reinforcement in an exceeding matrix based on supported cement. The proportion of sisal fiber used in concrete ranged from 0.1% to 2% of concrete and length of fiber 50mm to 60mm fiber length in concrete with aspect ratio. By adding short fibers, tensile strength is improved, thaw resistance is frozen, impact resistance, and concrete brittleness are reduced. In general, fiber does not enhance the concrete strength, as the replacement moment is reduced in the reinforcement of structural steel. This paper also represents fiber limitation content, environmental aspects, and FRC is the modern technical enhancement in the civil substructure. This review paper also describes the compressive strength test, flexural strength test, tensile strength test, impact strength test of FRC sisal fiber effect strength test.

The important goal of this article is to examine the thermally stratified flow of Oldroyd-B liquid induced by a stretchy sheet. Mathematical model of physical problem is situated with radiation and chemical reaction impacts. By help of similarity transformation, PDE’s are converted into ODE’s with dimensionless variables. Homotopy technique is employed for solving nonlinear ODE’s. Graphs are represented to notify the change of flow parameters, temperature and concentration parameters. Also mass and heat transfer rates are demonstrated through graphically. We observe that Thermal stratification constant reduces the heat transfer rate. On the other hand, thermophoretic and chemical reaction constants boost up the mass transfer rate.

Functionally graded materials (FGM) belong to the class of advanced materials whose properties vary along one or more coordinate. In the present study, an attempt has been made to manufacture FGM beams using a powder metallurgy process. The Al and Al2O3 in powder form are mixed to different volume fraction according to the rule of mixture. These samples are ball milled to form a proper blended mixture and to reduce the particle size for 1 hour at 250 rpm with tungsten carbide balls. A cold compacted die made of AISI D2 steel is used for preparing the sample. Different composition of Al and Al2O3 with Al2O3 varying from 0 to 10% is laid in the die using ethanol as the binder. This sample is compressed using hydraulic press with a load varying from 50-70 ton. The compressed sample is removed using a compression moulding machine, then it is sintered to a temperature of 650°C using a muffle furnace to form a smooth graded Al-Al2O3 FGM beam. Various defects such as surface cracks and bending were experienced during the preparation of samples; these defects were overcome by varying the parameters such as loading and sintering temperature.

This paper presents the experimental verification of ZVS push-pull converter. The prominence of this topology is to reduce the conduction losses and complexity of the circuit. The push-pull converter is used as DC-DC converter very suitable for low and medium power application. High efficiency, low switching loss and high power density are the predominance of this application. By boosting the switching frequency, high power density has been achieved as well as the complexity of the circuit reduces as size of the components reduced. Thus switching loss is minimized in order to obtain high switching frequency; this can be achieved by ZVS resonant techniques. This reduces switching losses as well as EMI. The aim of this work is to obtain the experimental results of ZVS push-pull DC to DC converter. Here 48V DC is converted into high frequency AC using push-pull inverter. It is stepped down to 12V AC using step down transformer. The 12V AC is converted into DC using a rectifier. The switches of the push-pull converter operate in ZVS condition to reduce the switching loss. The push pull DC to DC converter is constructed and tested. The experimental results are compared with simulation results.

This paper deals with comparison of the Non-isolated boost converter and push-pull converter. Here 48V DC is converted into AC with high frequency and it is stepped up. The aim of this work is to obtain the comparative analysis of non-isolated and push-pull converter by simulating the converter. The push-pull converter has advantages like reduced switching losses, stresses and EMI. The power output of push-pull converter seems to be of high value compared to the non-isolated boost converter. The simulation results of Non-isolated converter and Push-Pull converter was compared, shows that output power of push-pull converter is greater than non-isolated converter.

Experimental investigation of local heat transfer distribution on a smooth flat plate impinged by a normal slot jet is conducted. Present study concentrates on the influence of jet-to-plate spacing (z/b) and Reynolds number on the fluid flow and heat transfer distribution. A single slot jet with an aspect ratio (l/b) of about 50 is chosen to get the fully developed flow at the nozzle exit. Reynolds number based on slot width is varied from 4200 to 12,000 and jet-to-plate spacing (z/b) is varied from 0.5 to 12. The local heat transfer coefficients are estimated from the thermal images obtained from infrared thermal imaging camera. Measurement for the static wall pressure is carried out for various jet-to-plate spacings at a Reynolds number of 12,000. Normalized value of turbulence and velocity are measured using hot wire anemometer along the streamwise direction (x/b) for jet-to-plate spacings (z/b) of 1, 2, 4, 6, 8, 10 and 12. The entire flow field is divided into three regimes namely stagnation region (laminar boundary layer associated with favorable pressure gradient), transition region (associated with increase in turbulence intensities and heat transfer) and turbulent wall jet region. Semi-empirical correlation for the Nusselt number in the stagnation region is proposed. Heat transfer characteristics in the transition region are explained based on the fluid dynamic behavior from the hot wire measurements. Semi-empirical correlation for the Nusselt number in the wall jet region is presented using the velocity profile obtained from the hot wire measurements. (C) 2010 Elsevier Ltd. All rights reserved.

An attempt was made to use the waste water from textile industry for construction purpose, so that the shortage in water can be greatly reduced and the waste water can be suitably disposed for safe guarding the environment. The basic properties of the treated and untreated water from the textile industry were tested and the results were found to be satisfactory such that it can be used for construction purposes. By using the waste water from the textile industry cubes, cylinders and beams were casted and tested for its mechanical properties (compressive strength, tensile strength, flexural strength etc) and the result was found to be satisfactory. Hence the experiment was continued on for durability studies where the corrosion attack was also studied. The results of other durability studies were found to be satisfactory. In this experimental study the results of specimen’s casted using treated and untreated textile water were compared with the specimens casted with potable water. Since there was some corrosion, admixtures were added to counter act the same and the results were found to be satisfactory.