For a better understanding and description of the mass transport phenomena in dense multiphase gas-solids systems such as fluidized bed reactors, detailed and quantitative experimental data on the concentration profiles is required, which demands advanced non-invasive concentration monitoring techniques with a high spatial and temporal resolution. A novel technique based on the selective detect...

Flow in a gas-lift digester with a central draft-tube was investigated using computational fluid dynamics (CFD) and different turbulence closure models. The k-ω Shear-Stress-Transport (SST), Renormalization-Group (RNG) k-∊, Linear Reynolds-Stress-Model (RSM) and Transition-SST models were tested for a gas-lift loop reactor under Newtonian flow conditions validated against published experimental...

The numerical modeling and simulation of particle dispersion during the filling process a tubular combustion chamber are presented. By means multiphase large eddy simulations (LES) distribution inside circular diffuser-reactor is studied to analyze two-phase flow dynamics for metal powder in reactor with flame propagation. Typical accumulations found that form close wall also particles tend seg...

A 2D Euler-Euler multiphase computational fluid dynamics (CFD) model in conjunction with the kinetic theory of granular flow (KTGF) was applied to describe biomass pyrolysis a spouted bed reactor. The primary interest this work development CFD hydrodynamic reactor coupled for prediction product yields (gas, bio-oil, and char). is based on three parallel reactions formation products secondary re...

The present paper reviews the foundation and application of gamma-ray transmission Computed Tomography (CT) and Radioactive Particle Tracking (RPT) methods in industry. Those methods are primarily useful in oil and petrochemical industries, where processes need to be diagnosed for the purpose of design and/or operating conditions optimization. There are two categories of industrial tomography s...

This research study investigates the modelling and simulation of biomass anaerobic dark fermentation in bio-hydrogen production a continuous plug flow reactor. A CFD multiphase full transient model long-term horizons was adopted to biohydrogen mode. Both discharge biomass, which prevents accumulation solid parts, recirculation liquid phase ensure constant access nutrient solution. The effect hy...

Multiphase acid-catalyzed oxidation with hydrogen peroxide (H(2)O(2)) has been suggested recently to be a potential route to SOA formation from isoprene and its gas-phase oxidation products, the kinetics and chemical mechanism of this process have not been well-known yet. In this work, the uptake of 2-methyl-3-buten-2-ol (MBO), an important biogenic hydrocarbon and structurally similar to isopr...