The hydrodynamic studies of fluidized bed reactor has been reported in terms of pressure drop, minimum fluidization velocity and bed volume expansion to contribute to the optimization of the CNTs production parameters in fluidized bed reactors. Minimum fluidization velocity and pressure drop, as the most important parameters, were taken into account for the investigation of the hydrodynamic beh...

With the advent of state-of-the-art computers and their rapid availability, the time is ripe for the development of efficient uncertainty quantification (UQ) methods to reduce the complexity of numerical models used to simulate complicated systems with incomplete knowledge and data. The spectral stochastic finite element method (SSFEM) which is one of the widely used UQ methods, regards uncerta...

In this paper, a numerical study on pressure characteristics of fluid passing through a configuration of sudden expansion with central restriction only and sudden expansion with central restriction and fence has been carried out. The two dimensional steady differential equations for conservation of mass and momentum are solved for Reynolds number ranging from 50 to 200, percentage of central re...

Sudden stops can be characterized by sharp reversals in capital inflows, large declines in output, and steep collapses in real asset prices (Mendoza and Smith, 2009). In almost all recent crises, capital account reversals amounting to more than 10% of an afflicted country’s GDP have occurred (Calvo and Reinhart, 1999 and Nabli, 1999). More specifically, reversals in capital flows to emergin...

Modern methods of computational fluid dynamics have been used to study flows with mass supply in axisymmetric channels solid-propellant rocket motor charges. The studies were carried out the aim increasing accuracy predicting intraballistic parameters for performing engineering calculations. analysis changes characteristics flow part channel charge classical and nozzleless solid propellant moto...

P. S. Hrnjak, S. P. Vanka A combined experimental and computational study will be undertaken to develop better understanding and control of dispersed two-phase flow in headers. First, we will examine misty flow regimes in headers using the refrigeration setup from Project 96 for which the liquid and vapor phase flow rates can be individually measured from five tubes distributed along the length...

P. S. Hrnjak, S. P. Vanka A combined experimental and computational study will be undertaken to develop better understanding and control of dispersed two-phase flow in headers. First, we will examine misty flow regimes in headers using the refrigeration setup from Project 96 for which the liquid and vapor phase flow rates can be individually measured from five tubes distributed along the length...