Particle deposition and fluid flow characteristics in turbulent corrugated pipe flow using Eulerian-Lagrangian approach

Multi-scaling analysis of turbulent boundary layers over an isothermally heated flat plate with zero pressure gradient

“…In the present investigation, the normalized mean temperature ( Θ + ), streamwise mean velocity ( U + ), streamwise mean THF ( ), and mean RSS ( R + ) are the parameters of interest. The following equation (15) defines these parameters [ 41 , 42 ]: where, u τ denotes friction velocity, T τ indicates friction temperature, and are streamwise mean THF and mean RSS, respectively.…”

“…It is, therefore, chosen as the optimal mesh size for this evaluation. Moreover, the optimal mesh has a near-wall y + value of 0.1866 < 1, which is acceptable and sufficient for capturing near-wall turbulence [ [40] , [41] , [42] ]. The mesh generation for the computational domain around the flat plate is depicted in Fig.…”

Automated Monitoring System for Suspended Photocatalytic Batch Reactions Based on Online Circulatory Spectrophotometry

“…This method acquires absorbance at different wavelengths and separates the reaction and detection, providing the benefits of easy experimental operation and minimal interference with monitoring signals caused by the excitation light and stirring. However, this approach encountered problems, including signal noise from bubbles (SNB) [ 26 ], and solid particle deposition on the inner wall of pipelines (PDP) and on the windows of a flow cell (PDW) [ 14 , 27 , 28 ]. SNB refers to the sudden increase in signal intensity of absorbance caused by the presence of bubbles during monitoring.…”

“…SNB refers to the sudden increase in signal intensity of absorbance caused by the presence of bubbles during monitoring. PDP and PDW refer to the spontaneous adhesion of particles to the inner surfaces of the pipelines [ 27 , 28 ] and the windows of the flow cell, respectively. To address the SNB problem, a debubbler was developed to achieve separation through gravity by utilizing the density disparity between the gas and the liquid.…”