An Entropic Model for the Assessment of Streamwise Velocity Dip in Wide Open Channels

The three-dimensional structure of river flow and the presence of secondary currents, mainly near walls, often cause the maximum cross-sectional velocity to occur below the free surface, which is known as the “dip” phenomenon. The present study proposes a theoretical model derived from the entropy t...

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Main Authors:	Domenica Mirauda, Marilena Pannone, Annamaria De Vincenzo
Format:	Article
Language:	English
Published:	MDPI AG 2018-01-01
Series:	Entropy
Subjects:	dip phenomenon entropy river flow field velocity measurements
Online Access:	http://www.mdpi.com/1099-4300/20/1/69

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record_format	Article
spelling	doaj-e9f1d685fb3141519eb2d13d120f49822020-11-24T21:21:09ZengMDPI AGEntropy1099-43002018-01-012016910.3390/e20010069e20010069An Entropic Model for the Assessment of Streamwise Velocity Dip in Wide Open ChannelsDomenica Mirauda0Marilena Pannone1Annamaria De Vincenzo2School of Engineering, Basilicata University, Viale dell’Ateneo Lucano 10, 85100 Potenza, ItalySchool of Engineering, Basilicata University, Viale dell’Ateneo Lucano 10, 85100 Potenza, ItalySchool of Engineering, Basilicata University, Viale dell’Ateneo Lucano 10, 85100 Potenza, ItalyThe three-dimensional structure of river flow and the presence of secondary currents, mainly near walls, often cause the maximum cross-sectional velocity to occur below the free surface, which is known as the “dip” phenomenon. The present study proposes a theoretical model derived from the entropy theory to predict the velocity dip position along with the corresponding velocity value. Field data, collected at three ungauged sections located along the Alzette river in the Grand Duchy of Luxembourg and at three gauged sections located along three large rivers in Basilicata (southern Italy), were used to test its validity. The results show that the model is in good agreement with the experimental measurements and, when compared with other models documented in the literature, yields the least percentage error.http://www.mdpi.com/1099-4300/20/1/69dip phenomenonentropyriver flowfield velocity measurements
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Domenica Mirauda Marilena Pannone Annamaria De Vincenzo
spellingShingle	Domenica Mirauda Marilena Pannone Annamaria De Vincenzo An Entropic Model for the Assessment of Streamwise Velocity Dip in Wide Open Channels Entropy dip phenomenon entropy river flow field velocity measurements
author_facet	Domenica Mirauda Marilena Pannone Annamaria De Vincenzo
author_sort	Domenica Mirauda
title	An Entropic Model for the Assessment of Streamwise Velocity Dip in Wide Open Channels
title_short	An Entropic Model for the Assessment of Streamwise Velocity Dip in Wide Open Channels
title_full	An Entropic Model for the Assessment of Streamwise Velocity Dip in Wide Open Channels
title_fullStr	An Entropic Model for the Assessment of Streamwise Velocity Dip in Wide Open Channels
title_full_unstemmed	An Entropic Model for the Assessment of Streamwise Velocity Dip in Wide Open Channels
title_sort	entropic model for the assessment of streamwise velocity dip in wide open channels
publisher	MDPI AG
series	Entropy
issn	1099-4300
publishDate	2018-01-01
description	The three-dimensional structure of river flow and the presence of secondary currents, mainly near walls, often cause the maximum cross-sectional velocity to occur below the free surface, which is known as the “dip” phenomenon. The present study proposes a theoretical model derived from the entropy theory to predict the velocity dip position along with the corresponding velocity value. Field data, collected at three ungauged sections located along the Alzette river in the Grand Duchy of Luxembourg and at three gauged sections located along three large rivers in Basilicata (southern Italy), were used to test its validity. The results show that the model is in good agreement with the experimental measurements and, when compared with other models documented in the literature, yields the least percentage error.
topic	dip phenomenon entropy river flow field velocity measurements
url	http://www.mdpi.com/1099-4300/20/1/69
work_keys_str_mv	AT domenicamirauda anentropicmodelfortheassessmentofstreamwisevelocitydipinwideopenchannels AT marilenapannone anentropicmodelfortheassessmentofstreamwisevelocitydipinwideopenchannels AT annamariadevincenzo anentropicmodelfortheassessmentofstreamwisevelocitydipinwideopenchannels AT domenicamirauda entropicmodelfortheassessmentofstreamwisevelocitydipinwideopenchannels AT marilenapannone entropicmodelfortheassessmentofstreamwisevelocitydipinwideopenchannels AT annamariadevincenzo entropicmodelfortheassessmentofstreamwisevelocitydipinwideopenchannels
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An Entropic Model for the Assessment of Streamwise Velocity Dip in Wide Open Channels

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