Browsing Institutt for bygg- og miljøteknikk by Author "Kadia, Subhojit"
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Discharge Characteristics of Piano Key Weirs With and Without Upstream Siltation
Kumar, Binit; Kadia, Subhojit; Ahmad, Zulfequar (Peer reviewed; Journal article, 2021)The application of a piano key (PK) weir in a channel may lead to changes in the flow characteristics, upstream siltation conditions, and bed elevation. In this study, laboratory-based Type-A PK weir models with noses below ... -
Experimental and numerical investigations of the water surface profile and wave extrema of supercritical flows in a narrow channel bend
Kadia, Subhojit; Larsson, Sofia; Billstein, Mats; Lia, Leif; Pummer, Elena Marianne (Journal article; Peer reviewed, 2024)Supercritical flows in channel bends, e.g., in steep streams, chute spillways, and flood and sediment bypass tunnels (SBTs), experience cross-waves, which undulate the free surface. The designs of these hydraulic structures ... -
An OpenFOAM solver for computing suspended particles in water currents
Olsen, Nils Reidar Bøe; Kadia, Subhojit; Pummer, Elena Marianne; Hillebrand, Gudrun (Peer reviewed; Journal article, 2023)A new OpenFOAM solver has been developed for computing the spatial variation of particle concentrations in flowing water. The new solver was programmed in C ++ using OpenFOAM libraries, and the source code has been made ... -
A Reformed Empirical Equation for the Discharge Coefficient of Free-Flowing Type-A Piano Key Weirs
Kadia, Subhojit; Pummer, Elena Marianne; Kumar, Binit; Rüther, Nils; Ahmad, Zulfequar (Peer reviewed; Journal article, 2023)The existing equations for the discharge coefficient of Piano key weirs (PKWs) use a limited range of experimental data, which means that they are inappropriate for wide parametric ranges that might lead to significant ... -
Reynolds stress modeling of supercritical narrow channel flows using OpenFOAM: Secondary currents and turbulent flow characteristics
Kadia, Subhojit; Rüther, Nils; Ismail, Albayrak; Pummer, Elena (Peer reviewed; Journal article, 2022)In this study, the full Launder, Reece and Rodi pressure-strain model, and nonlinear boundary damping functions were incorporated in OpenFOAM® to simulate the turbulence-driven secondary currents in supercritical narrow ... -
Secondary Currents, Turbulence Characteristics, and Bed Shear Stress Variations in Supercritical Narrow Channel Flows
Kadia, Subhojit (Doctoral theses at NTNU;2024:213, Doctoral thesis, 2024)Sediment bypass tunnels (SBTs) belong to the active sediment management strategies of combating reservoir sedimentation, which route high-speed sediment-laden flows around reservoirs and primarily experience supercritical ... -
Sediment Movement over Type A Piano Key Weirs
Kumar, Binit; Kadia, Subhojit; Ahmad, Zulfequar (Peer reviewed; Journal article, 2021)This investigation deals with the mechanics of movement of singular quartz gravel and coarse sand riverbed particles upstream and over the inlet key of three Type A piano key weir (PKW) models, which were recorded with a ...