Northern Technical University/ Technical Institute in Mosul/ Department of Water Resources Techniques Northern Technical university/ Technical Institute in Mosul
Investigation of Flow Hydraulic Gradient Through Self-Spillway Dams Abdullah Ahmed Shekho, Dheyaa Ghanim Abdulrazzaq, Mohammad Akram Saadi AL-DABBAGH Salud Ciencia Y Tecnologia Serie De Conferencias, 2024 Dams are hydraulic structures constructed across rivers in order to store or rise water level for multi-purposes such as irrigation and power generation. The upstream face of the dam is subjected to water drag force which makes possible of flow seepage through the dam body. In the present study, the difference in water level between upstream and downstream sides of a rock-fill dam is investigated under different flow conditions demonstrating the flow behavior through the dam body. Two well graded samples of river aggregates with d50 of 56 mm and 40 mm are used to build the dam model. One sample of poor graded crushed rocks of d50 33 mm is included as well. The obtained results show that due to the porosity of the gabion containing the aggregates, the hydraulic gradient line dropped down significantly where it is inversely proportional to the porosity non-linear relationships for all. In addition, a linear relationship has dominated on the relation between upstream water depth and discharge through the self-spillway dam with and without impermeable core.
Simulation and comparison of helical and straight-bladed hydrokinetic turbines International Journal of Renewable Energy Research, 2018
Flow simulation over oblique cylindrical weirs Mehmet Ishak Yuce, Aemad A.H. Al-Babely, Mohammad A. Al-Dabbagh Canadian Journal of Civil Engineering, 2015 This paper presents a computational fluid dynamics (CFD) simulation to investigate the effects of the obliqueness of cylindrical weirs on the flow velocity distribution, the pressure distribution and the distribution of water depth over the weir crest. Three different cylindrical weirs with diameters of 0.114 m, 0.09 m, and 0.0635 m, with three dissimilar inclination angles of 90°, 135°, and 150° were used. The SSG Reynolds stress turbulence closure model was utilized in the analyses. The results show that the flow patterns are affected by the inclination angle with respect to the flow direction. It was noticed that inclination angle increment increases the velocity of flow at the downstream surface of the weir, thus increases the absolute value of the negative pressure, at the inward-moved end of the weir. The outward-moved end of the weir was observed not to be covered with water and extending with the increase of the inclination angle.
RECENT SCHOLAR PUBLICATIONS
Laboratory investigation of seepage coefficient through crushed-rock dams AA Shekho, MAS Al-Dabbagh, IAI Al-Hafidh, MI Yuce Water Practice & Technology 21 (2), 632-642 , 2026 2026.0
Investigation of Flow Hydraulic Gradient Through Self-Spillway Dams AA Shekho, DG Abdulrazzaq, MAS AL DABBAGH Salud, Ciencia y Tecnología-Serie de Conferencias 3, 875 , 2024 2024.0
Effects of upstream and downstream ramp on flow characteristics over a cylindrical weir MAS AL-Dabbagh, AA Shekho, MI Yuce, DG Abdulrazzaq International Journal of Applied Science and Engineering 20 (2), 1-10 , 2023 2023.0 Citations: 3
Assessment of Multi-blade Savonius Hydrokinetic Turbines DGA Mohammad Akram Saadi AL-DABBAGH, Abdullah Ahmed Shekho NeuroQuantology 20 (9), 66-81 , 2022 2022.0
Evaluation Of Flow Behavior Around Bridge Piers SD JASIM, MA AL-DABBAGH, AT HASEN, AA Shekho Solid State Technology 63 (6), 13759-13775 , 2020 2020.0 Citations: 1
Numerical evaluation of helical hydrokinetic turbines with different solidities under different flow conditions MA Al-Dabbagh, MI Yuce International Journal of Environmental Science and Technology 16 (8), 4001-4012 , 2019 2019.0 Citations: 35
Evaluation of flow behavior over broad-crested weirs of a triangular cross-section using CFD techniques MA Al-dabbagh, SD Al-zubaıdy The Eurasia Proceedings of Science Technology Engineering and Mathematics … , 2018 2018.0 Citations: 8
Investigation the Performance of Stream Water Wheel Turbines using CFD Techniques MA Al-dabbagh The Eurasia Proceedings of Science Technology Engineering and Mathematics … , 2018 2018.0 Citations: 2
Simulation and comparison of helical and straight-bladed hydrokinetic turbines MA Al-Dabbagh, MI Yuce International Journal of Renewable Energy Research 8 (1), 504-513 , 2018 2018.0 Citations: 31
Simulation of Helical hydrokinetic turbines in river flows MA Al-Dabbagh PhD Thesis, Department of Civil Engineering, University of Gaziantep, Turkey , 2017 2017.0 Citations: 3
Flow simulation over oblique cylindrical weirs MI Yuce, AAH Al-Babely, MA Al-Dabbagh Canadian Journal of Civil Engineering 42 (6), 389-407 , 2015 2015.0 Citations: 27
Overflow characteristic of cylindrical shape crest weirs over horizontal bed EAG Al Babely, AAW Al Muhammad, MA Al Dabbagh Tikrit Journal of Engineering Sciences 18 (4), 29-39 , 2011 2011.0 Citations: 10
Channel Inclination Angle Effect on Erosion and Sedimentation Downstream of Vertical Weirs IAI Al-Hafidh, MAS Al-Dabbagh, AA Shekho Available at SSRN 6030427 , 0
MOST CITED SCHOLAR PUBLICATIONS
Numerical evaluation of helical hydrokinetic turbines with different solidities under different flow conditions MA Al-Dabbagh, MI Yuce International Journal of Environmental Science and Technology 16 (8), 4001-4012 , 2019 2019.0 Citations: 35
Simulation and comparison of helical and straight-bladed hydrokinetic turbines MA Al-Dabbagh, MI Yuce International Journal of Renewable Energy Research 8 (1), 504-513 , 2018 2018.0 Citations: 31
Flow simulation over oblique cylindrical weirs MI Yuce, AAH Al-Babely, MA Al-Dabbagh Canadian Journal of Civil Engineering 42 (6), 389-407 , 2015 2015.0 Citations: 27
Overflow characteristic of cylindrical shape crest weirs over horizontal bed EAG Al Babely, AAW Al Muhammad, MA Al Dabbagh Tikrit Journal of Engineering Sciences 18 (4), 29-39 , 2011 2011.0 Citations: 10
Evaluation of flow behavior over broad-crested weirs of a triangular cross-section using CFD techniques MA Al-dabbagh, SD Al-zubaıdy The Eurasia Proceedings of Science Technology Engineering and Mathematics … , 2018 2018.0 Citations: 8
Effects of upstream and downstream ramp on flow characteristics over a cylindrical weir MAS AL-Dabbagh, AA Shekho, MI Yuce, DG Abdulrazzaq International Journal of Applied Science and Engineering 20 (2), 1-10 , 2023 2023.0 Citations: 3
Simulation of Helical hydrokinetic turbines in river flows MA Al-Dabbagh PhD Thesis, Department of Civil Engineering, University of Gaziantep, Turkey , 2017 2017.0 Citations: 3
Investigation the Performance of Stream Water Wheel Turbines using CFD Techniques MA Al-dabbagh The Eurasia Proceedings of Science Technology Engineering and Mathematics … , 2018 2018.0 Citations: 2
Evaluation Of Flow Behavior Around Bridge Piers SD JASIM, MA AL-DABBAGH, AT HASEN, AA Shekho Solid State Technology 63 (6), 13759-13775 , 2020 2020.0 Citations: 1
Laboratory investigation of seepage coefficient through crushed-rock dams AA Shekho, MAS Al-Dabbagh, IAI Al-Hafidh, MI Yuce Water Practice & Technology 21 (2), 632-642 , 2026 2026.0
Investigation of Flow Hydraulic Gradient Through Self-Spillway Dams AA Shekho, DG Abdulrazzaq, MAS AL DABBAGH Salud, Ciencia y Tecnología-Serie de Conferencias 3, 875 , 2024 2024.0
Assessment of Multi-blade Savonius Hydrokinetic Turbines DGA Mohammad Akram Saadi AL-DABBAGH, Abdullah Ahmed Shekho NeuroQuantology 20 (9), 66-81 , 2022 2022.0
Channel Inclination Angle Effect on Erosion and Sedimentation Downstream of Vertical Weirs IAI Al-Hafidh, MAS Al-Dabbagh, AA Shekho Available at SSRN 6030427 , 0