In this paper, the transient settling dynamics of a spherical particle sedimenting in a linearly stratified fluid is investigated by performing fully resolved direct numerical simulations. The settling behaviour is quantified for different values of Reynolds, Froude and Prandtl numbers. It is demonstrated that the transient settling dynamics is correlated to the induced Lagrangian drift of flow...

The dissolution of CaCO(3) is one of the ways ocean acidification can, potentially, greatly affect the ballast of aggregates. A diminution of the ballast could reduce the settling speed of aggregates, resulting in a change in the carbon flux to the deep sea. This would mean lower amounts of more refractory organic matter reaching the ocean floor. This work aimed to determine the effect of ocean...

Switched-capacitor (SC) circuits are analog discretetime signal processing circuits. At the front-end of these circuits, the continuous-time input signal has to be transformed into a discrete-time version. In order to optimize the settling speed of the SC circuit by creating step-input settling responses, the input interface circuit has to transform the continuous-time input signal into a unifo...

An experimental study is performed to measure the terminal settling velocities of spherical particles in surfactant based shear thinning viscoelastic (VES) fluids. The measurements are made for particles settling in unbounded fluids and fluids between parallel walls. VES fluids over a wide range of rheological properties are prepared and rheologically characterized. The rheological characteriza...

This article examines the effect of overlapping institutions in trade policy, where the World Trade Organization, preferential trade agreements, and other economic negotiation venues give states many options for negotiating rules and settling disputes. This article argues that overlapping institutions influence trade politics at three stages: selection of venue, negotiation of liberalization co...

This paper presents an application of Artificial Neural Network (ANN) and Genetic Algorithm (GA) for system identification for controller tuning in a pH process. In this paper, the ANN based approach is applied to estimate the system parameters. Once the variations in parameters are identified frequently, GA optimally tunes the controller. The simulation results show that the proposed intellige...

Distributed finite-time attitude containment control for multiple rigid bodies is addressed in this paper. When there exist multiple stationary leaders, we propose a model-independent control law to guarantee that the attitudes of the followers converge to the stationary convex hull formed by those of the leaders in finite time by using both the one-hop and two-hop neighbors’ information. We al...

This paper deals with certain aspects of operation of a third order Variable Structure System using Sliding Mode Control (SMC). SMC is applied to the process plant using LabVIEW (Laboratory Virtual Instrumentation Engineering Workbench). The process plant and its control are simulated using LabVIEW 2011 and the results are compared with conventional PID controller. It is found that the settling...