Industrial

Active brazed ceramic cemented carbide compound drills for machining lamellar graphite cast iron
The optimum and efficient way of machining is linked to the choice of the most appropriate cutting tool and cutting tool material. High performance cutting ceramics are characterized by excellent hardness properties at elevated temperatures. For this reason, cutting ceramics meet the requirements for machining with high cutting speeds to increase process productivity. Whereas cutting ceramics a...


Detailed Investigations of the Countercurrent Multiphase (Gas–Liquid and Gas–Liquid–Liquid) Flow Behavior by Three-Dimensional Computational Fluid Dynamics Simulations
This paper focuses on the detailed investigations of the (multi-) liquid flow behaviors on an inclined stainless steel plate in simulations and experiments. Simulations are carried out with FLUENT 6.3; a three-dimensional computational fluid dynamics model considering the gravity, surface tension, and local drag force is developed and presented. Experimental data is obtained with optical method...
Solubility Phase Diagram of the Quaternary System Li+, Mg2+//Cl–, SO42––H2O at 298.15 K: Experimental Redetermination and Model Simulation
Solubility isotherms for the ternary system MgCl2–MgSO4–H2O and the quaternary reciprocal system Li+, Mg2+//Cl–, SO42––H2O were determined at 298.15 K by an isothermal dissolution method. In the ternary phase diagram, there are six solubility branches corresponding to the solid phases MgSO4·nH2O(s) (n = 7, 6, 5, 4, 1) and MgCl2·6H2O(s). In the quaternary equilibrium phase diagram, t...


Foamlike Xanthan Gum/Clay Aerogel Composites and Tailoring Properties by Blending with Agar
Foamlike aerogel composites based on renewable xanthan gum (XG) and sodium montmorillonite clay (Na+-MMT) have been prepared using an environmentally friendly freeze-drying process. Additionally, the biobased polysaccharide agar was used to improve the properties of XG/clay aerogels. Fourier transform infrared spectroscopy showed molecular interactions between biopolymers and clay in the aeroge...
A simple method to assess the wettability of nonwoven geotextiles
This paper presents a simple test method and analysis based on capillary rise in porous media to assess the wettability of nonwoven geotextiles. The apparent opening pore size and porosity of the nonwoven geotextiles and their fibres' surface condition were found to play a significant role in the extent of the water capillary rise in the geotextiles. Prediction of the maximum capillary rise usi...


Nonwoven geotextiles to filter clayey sludge: An experimental study
A host of mining practices produce fine-grained mineral sludge, such as mature fine tailing from oil-sand extraction. These sludges are hard to dewater because of their high clay content and their low hydraulic conductivity. This paper describes pressure filtration tests in which eight different nonwoven geotextiles (GTXs) were used to filter high-clay-content sludges. The sludges were formulat...
Stability Analysis and Optimization Algorithms for the Set-Up of Infeed Centerless Grinding
This paper introduces new algorithms for analysis and optimization of infeed centerless grinding, based on high-level integration of grinding models into a web-based simulation. This holistic approach to simulation facilitates system-level simulation and solvers for several interlinked problems associated with the process mechanics. Emphasis is on structuring the model-based simulation as well ...

A dynamic method to determine the supports capacity in longwall coal mining
The determination of the correct design support capacity of shield supports is the key to the safe control of strata within the vicinity of longwall coal panels. There are a number of design methods that have been developed, dependant on the prevalent geological and mining conditions. However, these methods have been found to be inappropriate to the design of the supports for longwall panels pr...
Effect of Different Reaction Conditions on the Deactivation of Alumina-Supported Cobalt Fischer–Tropsch Catalysts in a Milli-Fixed-Bed Reactor: Experiments and Modeling
This paper focuses on the deactivation of a cobalt-based alumina-supported Fischer–Tropsch catalyst in a milli-fixed-bed reactor under different operating conditions. Different catalyst deactivation behaviors were observed at different syngas H2/CO ratios and temperatures. The deactivation follows a two-step profile, where the initial deactivation is attributed to sintering, whereas the long-...

Prediction of Thermophysical Properties for Binary Mixtures of Common Ionic Liquids with Water or Alcohol at Several Temperatures and Atmospheric Pressure by Means of Artificial Neural Network
In this work, thermophysical properties such as density, dynamic viscosity, excess molar volume, refractive index and speed of sound of binary mixtures of common ionic liquids (ILs) with water or alcohol are predicted by the artificial neural network (ANN) technique. In each ANN proposed models, the density and dynamic viscosity of pure components IL, water or alcohol (including methanol, ethan...
Effect of Metal Ratio and Preparation Method on Nickel–Tungsten Carbide Catalyst for Hydrocracking of Distillers Dried Grains with Solubles Corn Oil
The hydrocracking of distillers dried grains with solubles (DDGS) corn oil over bimetallic carbide catalysts was explored for green diesel production. A catalyst composed of nickel–tungsten (Ni–W) carbide supported on Al-SBA-15 was designed based on the ability of nickel to adsorb and activate hydrogen and the potential of tungsten for hydrogenation reactions. Four different Ni–W ratios (...

Quantification of the Adsorption Capacity of Fly Ash
Fly ash adsorption capacity is a critical property for the beneficial utilization of fly ash; although this capacity could be favorable for some applications, it may not favor the use of fly ash for other applications such as cement and concrete production. In both cases the lack of fly ash adsorption capacity quantification tools and procedures limits the beneficial utilization of fly ash. Thi...
Learning object deformation models for robot motion planning
In this paper, we address the problem of robot navigation in environments with deformable objects. The aim is to include the costs of object deformations when planning the robot’s motions and trade them off against the travel costs. We present our recently developed robotic system that is able to acquire deformation models of real objects. The robot determines the elasticity parameters by phy...
Generation of hierarchical micro-structures for anisotropic wetting by elliptical vibration cutting
This paper reports enhanced anisotropic wettability using two-level hierarchical micro-structures. First-order micro-channels with superimposed second-order micro-textures were machined on aluminum surfaces using ultrasonic elliptical vibration cutting (EVC). Controllable sinusoidal micro-textures with a wavelength one order of magnitude smaller than the widths of the first-order micro-channels...
Numerical experiment-artificial intelligence approach to develop empirical equations for predicting leakage rates through GM/GCL composite liners
The aim of this study is to develop empirical equations to predict the liquid leakage rate through a composite liner comprising a geomembrane and a geosynthetic clay liner (GM/GCL) underlain by a free draining boundary and having a circular or a longitudinal defect in the geomembrane. For this purpose, an intensive numerical experimental program was conducted where different defect geometries a...