Search

Multiphase flow equations for two components (for instance water and hydrogen) and two phases (liquid and gas), with equilibrium phase exchange, have been used to simulate the process of miscible displacement in porous media. Laboratory and field studies have shown that this assumption fails under certain circumstances especially for accurate description of the pollution and a finite transfer velocity, called here the kinetics. We propose a numerical scheme based on a two-step convection/diffusion-relaxation strategy to simulate the non-equilibrium model. In the first step we solve the intra-phase transfer (convection/diffusion) working with liquid saturation, liquid pressure and dissolved hydrogen concentration as primary variables. In the second step, we address the interphase transfer using the solubility relation that is solved by projection on the equilibrium state. This technique also ensures the positivity for the liquid saturation and produces energy estimates. One important advantage of this approach is the fact that the simulation can be easily adapted to different linear and non-linear equilibrium laws between phases. Another advantage is that our proposed method includes the kinetics in a projection step and keeps the displacement of the components. We implemented this new model in in-house simulation code and present numerical results comparing the model with equilibrium and non-equilibrium one. [ABSTRACT FROM AUTHOR]

A study conducted by researchers at Northern Border University aimed to model the degradation of Amoxicillin (AMX) and Doxycycline (DOX) using Zinc oxide (ZnO) nanoparticles in microreactor systems. The objective was to understand the interaction between photocatalytic degradation kinetics and mass transfer processes to optimize conditions for efficient antibiotic removal from contaminated water. The study found that higher flow rates in the microreactor were preferable to reduce mass transfer limitations and approach intrinsic kinetics, highlighting the potential of ZnO-based oxidation processes for wastewater treatment. The research was published in Engineering, Technology & Applied Science Research. [Extracted from the article]

A recent study conducted by researchers at Rikkyo University in Tokyo, Japan, explores the use of liposomes in electrokinetic chromatography (LEKC) to analyze mass transfer kinetics at lipid bilayer membranes. The researchers developed a method that combines LEKC and moment theory to study the structural characteristics of cortisone peaks in LEKC systems. This method offers advantages over conventional techniques, as it allows for the analysis of mass transfer phenomena at the real lipid bilayer of liposomes. The research was supported by Grants-in-Aid for Scientific Research (KAKENHI) and has been peer-reviewed. For more information, interested individuals can contact the researchers at Rikkyo University. [Extracted from the article]

Keywords: Cancer; Health and Medicine; Oncology EN Cancer Health and Medicine Oncology 498 498 1 10/24/23 20231024 NES 231024 2023 OCT 24 (NewsRx) -- By a News Reporter-Staff News Editor at Cancer Weekly -- A new study on cancer is now available. For more information on this research see: Copper isotope ratios in serum do not track cancerous tumor evolution, but organ failure. [Extracted from the article]

Keywords for this news article include: Wageningen, Netherlands, Europe, Food Science, Wageningen University. Keywords: Wageningen; Netherlands; Europe; Food Science EN Wageningen Netherlands Europe Food Science 209 209 1 06/05/23 20230608 NES 230608 2023 JUN 8 (NewsRx) -- By a News Reporter-Staff News Editor at Food Weekly News -- Investigators discuss new findings in Food Science. [Extracted from the article]

We introduce bsmKinetic, an implementation of the stochastic multichannel point-transition approach to simulation of the charge transfer kinetics in molecular systems with reorganization of many intramolecular high-frequency vibrational mode in solvents with several relaxation timescales. The software provides simulation of the charge transfer kinetics in the molecular systems with many electronic states involved in photochemical transformations. It also allows simulating the charge transfer occurring in both equilibrium and nonequilibrium regimes. bsmKinetic is open-source software distributed under the terms of the GPL without additional components. Software is implemented on multiple computing platforms. It exploits Matsumoto and Nishimura source code for pseudorandom number generator and a hierarchy of custom parallelization of the stochastic trajectories built on MPI. [ABSTRACT FROM AUTHOR]

Keywords for this news article include: Guizhou University, Guiyang, People's Republic of China, Asia, Xylitol, Food Research, Sugar Alcohols. The news correspondents obtained a quote from the research from Guizhou University: "This study investigated the mass transfer kinetics and the one-way diffusion simulation of sodium chloride (NaCl) during the curing process. Keywords: Food Research; Sugar Alcohols; Xylitol EN Food Research Sugar Alcohols Xylitol 107 107 1 04/17/23 20230420 NES 230420 2023 APR 20 (NewsRx) -- By a News Reporter-Staff News Editor at Food Weekly News -- New research on food research is the subject of a new report. [Extracted from the article]