Search Results - "Tsakiris, Achilleas G."

Flow characteristics around a wall-mounted spherical obstacle in a thin boundary layer by Hajimirzaie, Seyed M., Tsakiris, Achilleas G., Buchholz, James H. J., Papanicolaou, Athanasios N.

“…The mean wake structures and turbulent flow fields of a wall-mounted spherical obstacle placed in a thin laminar boundary layer, of thickness 14 % of the…”
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Signature of bedload particle transport mode in the acoustic signal of a geophone by Tsakiris, Achilleas G., Papanicolaou, A. (Thanos) N., Lauth, Timothy J.

“…The purpose of this study is to develop a relationship for predicting the bedload rate from the acoustic signal of a geophone, under the rolling and saltating…”
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Effects of a fully submerged boulder within a boulder array on the mean and turbulent flow fields: Implications to bedload transport by Papanicolaou, Athanasios N., Kramer, Casey M., Tsakiris, Achilleas G., Stoesser, Thorsten, Bomminayuni, Sandeep, Chen, Zhuo

“…The objective of this coupled experimental and numerical study is to provide insight into the mean and turbulent flow fields within an array of fully…”
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A probabilistic model for sediment entrainment： The role of bed irregularity by Elhakeem, Mohamed, Papanicolaou, A.N. Thanos, Tsakiris, Achilleas G.

“…A generalized probabilistic model is developed in this study to predict sediment entrainment under the incipient motion, rolling, and pickup modes. A novelty…”
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Nonhydrostatic Quasi-3D Model Coupled with the Dynamic Rough Wall Law for Simulating Flow over a Rough Bed with Submerged Boulders by Uchida, Tatsuhiko, Fukuoka, Shoji, Papanicolaou, A. (Thanos) N, Tsakiris, Achilleas G

“…AbstractA reliable depth-integrated model that is suited for capturing the complex flow found with an array of submerged boulders over a permeable rough bed…”
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Identification of the Burial Depth of Radio Frequency Identification Transponders in Riverine Applications by Tsakiris, Achilleas G, Papanicolaou, A. N. (Thanos), Moustakidis, I. V. (Danny), Abban, Benjamin K

“…AbstractRadio frequency identification (RFID) technology enables bidirectional, remote communication between a reader and a transponder (or tag) with a unique…”
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Boulder Array Effects on Bedload Pulses and Depositional Patches by Papanicolaou, A. N. (Thanos), Tsakiris, Achilleas G., Wyssmann, Micah A., Kramer, Casey M.

“…The influence of boulders in high gradient gravel‐bed rivers can be significant. Yet few studies have isolated their role in regulating bedload. It is…”
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The use of fractals to quantify the morphology of cluster microforms by Papanicolaou, A.N. (Thanos), Tsakiris, Achilleas G., Strom, Kyle B.

“…The emphasis of this paper is on the fractal-analysis of irregular objects like particle clusters that fill the two-dimensional Euclidean space R 2. A common…”
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Influence of collective boulder array on the surrounding time-averaged and turbulent flow fields by Tsakiris, Achilleas G., Papanicolaou, A. N. Thanos, Hajimirzaie, Seyed M., Buchholz, James H. J.

“…Arrays of large immobile boulders, which are often encountered in steep mountain streams, affect the timing and magnitude of sediment transport events through…”
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Influence of collective boulder array on the surrounding time-averaged and turbulent flow fields by Tsakiris, Achilleas G., Papanicolaou, A. N. Thanos, Hajimirzaie, Seyed M., Buchholz, James H. J.

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Turbulent flow over an array of boulders placed on a rough, permeable bed by Liu, Yan, Stoesser, Thorsten, Fang, Hongwei, Papanicolaou, Athanasios, Tsakiris, Achilleas G.

“…•A large-eddy simulation method is applied to complex geophysical flow.•The simulation is validated successfully with experimental data.•The complex…”
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