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Hadi Samsam-Khayani, Shabnam Mohammadshahi and Kyung Chun Kim
In this study, two-dimensional time-resolved particle image velocimetry (2D-TR-PIV) was used to investigate the effect of the external domain on oscillating jets from double-feedback fluidic oscillators. Two different cases with different Re numbers (268...
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Zachary Robison and Andreas Gross
To better understand the wake effects at low Reynolds numbers, large-eddy simulations of a 50% reaction low-pressure turbine stage and a linear cascade with two different bar wake generators were carried out for a chord Reynolds number of 50,000. For the...
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Vitaly Sergeev, Nikolai Vatin, Evgeny Kotov, Darya Nemova and Svyatoslav Khorobrov
The main objective of the study is to propose a technical solution integrated into the pipeline for the transition of the flow regime from slug to bubbly two-phase flow. The object of research is isothermal two-phase gas?Newtonian-liquid flow in a horizo...
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John Stith Pallister,Angela K. Diefenbach,William C. Burton,Jorge Muñoz,Julia P. Griswold,Luis E. Lara,Jacob B. Lowenstern,Carolina E. Valenzuela
Pág. 277 - 294
We use geologic field mapping and sampling, photogrammetric analysis of oblique aerial photographs, and digital elevation models to document the 2008-2009 eruptive sequence at Chaitén Volcano and to estimate volumes and effusion rates for the lava dome. ...
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Ming Zhao
This paper reviews the recent development of numerical modelling of local scour around hydraulic and marine structures. The numerical models for simulating local scour are classified into five categories: sediment transport rate models, two-phase models,...
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Seung Il Baek and Joon Ahn
The effects of bulk flow pulsations on film cooling in gas turbine blades were investigated by conducting large eddy simulation (LES) and Reynolds-averaged Navier?Stokes simulation (RANS). The film cooling flow fields under 32 Hz pulsation in the mainstr...
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Davide Lengani, Daniele Simoni, Marina Ubaldi, Pietro Zunino and Francesco Bertini
A time-resolved particle image velocimetry (TR-PIV) system has been employed to investigate the unsteady propagation of upstream wakes in a low-pressure turbine cascade. Data are obtained in the steady state condition and for two passing wake reduced fre...
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Troels Aagaard, Joost Brinkkemper, Drude F. Christensen, Michael G. Hughes and Gerben Ruessink
The existence of sandy beaches relies on the onshore transport of sand by waves during post-storm conditions. Most operational sediment transport models employ wave-averaged terms, and/or the instantaneous cross-shore velocity signal, but the models ofte...
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Cary Smith, Mark Gragston, Yue Wu and Zhili Zhang
This work provides an analysis of an air-assisted atomizing nebulizer?s spray characteristics and combustion behaviors via application of various diagnostics. Two-phase far-field flows and flames of liquid ethanol and practical aviation fuel Jet A were c...
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Jihye Baik, Junbum Park, Gyeongjun Lee, Sungchul Kim and Jungho Kim
We numerically investigate the effects of an incoherent front cover glass on the current?voltage (J?V) characteristics of a Cu(In,Ga)Se2 (CIGS) solar cell using an integrated optoelectronic model. A 3-mm cover glass?the thickness of which was larger than...
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Nabila Berchiche, Vladimir I. Krasilnikov and Kourosh Koushan
In the present work, a generic ducted azimuth propulsor, which are frequently installed on a wide range of vessels, is subject to numerical investigation with the primary focus on performance deterioration and dynamic loads arising from the influence of ...
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John Restrepo, Nelson Correa-Rojas and Jorge Herrera-Ramirez
Speckle noise is a well-documented problem on coherent imaging techniques like Digital Holography. A method to reduce the speckle noise level is presented, based on introducing a Digital Micromirror Device to phase modulate the illumination over the obje...
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Wenping Luo, Weiqin Liu, Meng Yang, Shuo Chen, Xuemin Song and Weiguo Wu
Operating Offshore Floating Vertical Axis Wind Turbines (OF-VAWT) have the potential to perform well in the deep-sea area. Some researchers gave performance prediction by developing simplified computing models. However, these models have imperfections in...
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Hao Li and Mostafa R. A. Nabawy
In this paper, the effects of stroke amplitude and wing planform on the aerodynamics of hovering flapping wings are considered by numerically solving the incompressible Navier?Stokes equations. The wing planform geometry is represented using a beta-funct...
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Jong-Dae Do, Sang-Kwon Hyun, Jae-Youll Jin, Byunggil Lee, Weon-Mu Jeong, Kyong-Ho Ryu, Won-Dae Back, Jae-Ho Choi and Yeon S. Chang
Severe shoreline erosions are commonly observed due to the side effects of breakwaters constructed to protect the habitat. These breakwaters can cause wave energy differences behind the structure due to diffraction, inducing longshore sediment transport ...
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Meng-Syue Li, Cheng-Jung Hsu, Hung-Chu Hsu and Li-Hung Tsai
The purpose of this study is to perform a numerical simulation of caisson breakwater stability concerning the effect of wave overtopping under extreme waves. A numerical model, which solves two-dimensional Reynolds-averaged Navier?Stokes equations with t...
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Fadia Ticona Rollano, Thanh Toan Tran, Yi-Hsiang Yu, Gabriel García-Medina and Zhaoqing Yang
Industry-specific tools for analyzing and optimizing the design of wave energy converters (WECs) and associated power systems are essential to advancing marine renewable energy. This study aims to quantify the influence of phase information on the device...
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Camila Braga Vieira, Giuliana Litrico, Ehsan Askari, Gabriel Lemieux and Pierre Proulx
This paper presents an in-depth numerical analysis on the hydrodynamics of a bubble column. As in previous works on the subject, the focus here is on three important parameters characterizing the flow: interfacial forces, turbulence and inlet superficial...
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Urban ?var Ba?kovic, Rok Vihar, Igor Mele and Toma? Katra?nik
An innovative computationally efficient method for the simultaneous determination of top dead centre (TDC) offset and pressure offset is presented. It is based on characteristic deviations of the rate of heat release (ROHR) that are specific for both off...
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A. R. PERALTA HERNÁNDEZ,L. R. BARBA MARTÍNEZ,V. O. MAGAÑA RUEDA,A. D. MATTHIAS,J. J. LUNA RUÍZ
Relatively few studies have been performed about the onset, duration, and intensity of the canícula (midsummer drought) within central México in response to El Niño/Southern Oscillation (ENSO) events. The objective of our research is to a...
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