Venturi system widely utilizes in industrial applications to clean the gas and reduces pollutions. Therefore, many studies have been conducted, especially in terms of pressure drop because it is one of the main parameters to determine its efficiency. But the phenomenon of mass transfer in the venturi scrubber did not get much attention. In this work, mass transfer was studied through a two-dimensional simulation of cleaning the gas produced by the gasification of biomass in Venturi scrubber with boundary conditions represented in air inlet velocities of 10, 15, and 20 m/s and water inlet mass flow of 0.02,0.04 and 0.06kg/s. Navier-Stokes equations were solved numerically and the mass transfer technique was treated by the Volume Of Fluid (VOF) model, using CFD software. The mass fraction, velocity and pressure contours, and profiles, were presented to analyze the obtained results. Also, the Probability Density Function (PDF) of mass transfer was investigated. The results show that the proposed venturi has the best mass transfer performance with a PDF that reaches 97.67 for velocity liquid of 20 m/s. In addition, the removal efficiency is higher with the decrease of liquid flow rates.

In today's world, a website is a must for every business/institute/organization, etc. This paper tells about the HTML (the Hyper Text Markup Language) used for developing Web Pages and understanding the methodology to describe the scope, objectives, strategy, and approach of front-end web development. This paper also throws light on various HTML tags that are necessary for web development.

Nonlinear loads inject reactive and harmonic currents into the power supply, causing the deterioration of the voltages and currents in the power system. Active power filters (APFs) are commonly employed to solve this problem and improve the power quality produced by the power source. The Three-Level Neural-Point-Clamped four-legged active power filter is proposed in this work. A control approach based on the instantaneous power theory has been applied and studied to meet the need of the active power filtering function under balanced, unbalanced, and distorted power supply voltages (including 3rd and 5th harmonics). On the other side, the inverter switching state control is realized based on the PWM current controller. we use the direct network voltage (PLL) detection system. For the validation of the performances of the APF proposed topology, simulation results have been carried out under the use of the proposed control strategy and the identification approach.