Flow field in shallow reservoir with varying inlet and outlet position

ABSTRACT Shallow reservoirs are used for multiple purposes, such as storm water retention and trapping of sediments. Reliable predictions of the flow fields are necessary to inform the design and operation of these structures. Using numerical simulations, we performed a systematic analysis of the influence of the location of the inlet and outlet on the flow fields developing in rectangular shallow reservoirs of various sizes. Depending on the relative location of the inlet and outlet with respect to the reservoir centreline, contrasting flow patterns are obtained, involving either no flow reattachment, or a jet reattached on either of the reservoir sidewalls. The results reveal also the occurrence of bi-stable flow configurations, i.e. different steady state flow fields are reached depending on the flow history. This is of high relevance for the design of shallow reservoirs as such configurations should certainly be avoided to achieve a robust hydraulic sizing of the reservoir.

[1]  Adrian J. Saul,et al.  Sediment Deposition in Storage Tanks , 1992 .

[2]  Jesper Persson,et al.  The hydraulic performance of ponds of various layouts , 2000 .

[3]  V. Stovin,et al.  Bed Shear Stress Boundary Condition for Storage Tank Sedimentation , 2003 .

[4]  H. Wittgren,et al.  How hydrological and hydraulic conditions affect performance of ponds , 2003 .

[5]  H.R.Albert Jagers,et al.  Study on the channel development in a wide reservoir , 2004 .

[6]  S. Kantoush.  Experimental study on the influence of the geometry of shallow reservoirs on flow patterns and sedimentation by suspended sediments , 2008 .

[7]  E. Bollaert,et al.  Experimental and numerical modelling of sedimentation in a rectangular shallow basin , 2008 .

[8]  Matthieu Dufresne,et al.  CFD Modeling of Solid Separation in Three Combined Sewer Overflow Chambers , 2009 .

[9]  Sébastien Erpicum,et al.  2D numerical flow modeling in a macro‐rough channel , 2009 .

[10]  M. Pirotton,et al.  Classification of flow patterns in rectangular shallow reservoirs , 2010 .

[11]  M. Pirotton,et al.  Coupling between flow and sediment deposition in rectangular shallow reservoirs , 2013 .

[12]  M. Pirotton,et al.  Experimental investigation of flow pattern and sediment deposition in rectangular shallow reservoirs. , 2010 .

[13]  Taylor Francis.  Experimental study of velocity fields in rectangular shallow reservoirs , 2011 .

[14]  R. Burrows,et al.  Modeling Free-Surface Flow in Rectangular Shallow Basins by Using Lattice Boltzmann Method , 2011 .

[15]  M. Pirotton,et al.  Numerical Investigation of Flow Patterns in Rectangular Shallow Reservoirs , 2011 .

[16]  Hongqin Xue,et al.  Inverse Calculation Model for Optimal Design of Rectangular Sedimentation Tanks , 2013 .

[17]  A. Pantokratoras,et al.  CFD methodology for sedimentation tanks: The effect of secondary phase on fluid phase using DPM coupled calculations , 2013 .

[18]  Anton Schleiss,et al.  Effet de la rugosité du fond d'un réservoir rectangulaire à faible profondeur sur le champ d'écoulement , 2014 .

[19]  J. Bertrand-Krajewski,et al.  Computational fluid dynamics modelling of flow and particulate contaminants sedimentation in an urban stormwater detention and settling basin , 2014, Environmental Science and Pollution Research.

[20]  J. Hervouet,et al.  Numerical Modelling of Two-Dimensional Flow Patterns in Shallow Rectangular Basins , 2014 .

[21]  B. Khoo,et al.  Shape effect on mixing and age distributions in service reservoirs , 2014 .

[22]  Wai-Yin Ng,et al.  A modeling investigation of the impact of street and building configurations on personal air pollutant exposure in isolated deep urban canyons. , 2014, The Science of the total environment.

[23]  M. Pirotton,et al.  Experimental investigation of meandering jets in shallow reservoirs , 2014, Environmental Fluid Mechanics.

[24]  M. Pirotton,et al.  Prediction of Mean and Turbulent Kinetic Energy In Rectangular Shallow Reservoirs , 2014 .

[25]  B. Michalec.  Evaluation of an Empirical Reservoir Shape Function to Define Sediment Distributions in Small Reservoirs , 2015 .

[26]  S. B. Mitchell,et al.  Computational fluid dynamics modelling of different detention pond configurations in the interest of sustainable flow regimes and gravity sedimentation potential , 2015 .

[27]  Benjamin Dewals,et al.  Can meandering flows in shallow rectangular reservoir be modelled with the 2D shallow water equations , 2015 .

[28]  S. Barraud,et al.  Event-based quantification of emerging pollutant removal for an open stormwater retention basin - loads, efficiency and importance of uncertainties. , 2015, Water research.

[29]  A. Z. Aris,et al.  Discriminant analysis for the prediction of sand mass distribution in an urban stormwater holding pond using simulated depth average flow velocity data , 2016, Environmental Monitoring and Assessment.

[30]  M. Pirotton,et al.  Maximum energy dissipation to explain velocity fields in shallow reservoirs , 2018 .