A5046812686- Hydrology and Sediment Transport Processes
- Fluid Dynamics and Turbulent Flows
- Soil erosion and sediment transport
- Particle Dynamics in Fluid Flows
- Heat Transfer Mechanisms
- Hydraulic flow and structures
- Wind and Air Flow Studies
- Coastal and Marine Dynamics
- Aeolian processes and effects
- Flood Risk Assessment and Management
- Geological formations and processes
- Hydrology and Watershed Management Studies
- Precipitation Measurement and Analysis
- Microgrid Control and Optimization
- Smart Grid Energy Management
- Meteorological Phenomena and Simulations
- Advanced materials and composites
- Experimental Learning in Engineering
- Plant Water Relations and Carbon Dynamics
- Metal Alloys Wear and Properties
- Granular flow and fluidized beds
- Fluid Dynamics and Vibration Analysis
- Microstructure and Mechanical Properties of Steels
- Aerodynamics and Acoustics in Jet Flows
- Innovations in Educational Methods
ECAM-EPMI
2018-2025
Laboratoire Quartz
2022-2025
École Supérieure d'Ingénieurs en Génie Électrique
2018-2024
École de Biologie Industrielle
2011-2020
Quartz Corp (Norway)
2020
ECAM Rennes Louis de Broglie
2020
Institut Polytechnique Saint-Louis
2006-2012
Eternity Bioscience (United States)
2011
European Bioinformatics Institute
2011
CY Cergy Paris Université
2008-2011
Abstract An ordinary differential equation (ODE) for velocity distribution in open channel flows is presented based on an analysis of the Reynolds-averaged Navier–Stokes equations and a log-wake modified eddy viscosity distribution. This proposed allows to predict velocity-dip-phenomenon, i.e. maximum below free surface. Two different degrees approximations are presented, semi-analytical solution ODE, full dip-modified-log-wake law (fDMLW-law) simple (sDMLW-law). Velocity profiles two laws...
In Lake Ziway watershed in Ethiopia, the contribution of river inflow to water level has not been quantified due scarce data for rainfall-runoff modeling. However, satellite rainfall estimates may serve as an alternative source model inputs. this study, we evaluated performance and bias correction Climate Hazards Group InfraRed Precipitation (CHIRP) estimate simulation at Meki Katar catchments using Hydrologiska Byråns Vattenbalansavdelning (HBV) hydrological model. A non-linear power method...
Applicability of satellite rainfall products must be explored since rain gauge networks have limitations to provide adequate spatial coverage. In this study, Climate Hazards InfraRed Precipitation (CHIRP) satellite-only product was evaluated for rainfall-runoff modeling whereas the simulated runoff served as input simulate water levels Lake Ziway from 1986 2014. CHIRP dataset bias-corrected using power transformation and used Hydrologiska Byråns Vattenbalansavdelning (HBV) model streamflow...
Central Rift Valley Lakes sub-basin, Ethiopia. The competition for water is rapidly increasing in lakes sub-basin due to the combined effect of various resources developments. However, impacts recent and future development pathways on balance three interconnected (i.e. Lake Ziway, Langano Abiyata) are unknown. Water Evaluation And Planning (WEAP) model was used assess lakes. We considered that are, (2009–2018), short-term (2019–2028) long-term (2029–2038). Ziway inflows from six catchments...
The semitheoretical function of Nezu and Nakagawa (1993, Turbulence in Open-Channel Flows, A. Balkema, ed., Rotterdam, Netherlands) for the turbulent kinetic energy k is valid only where local equilibrium a good approximation. From an estimation difference between production its dissipation G−ϵ, we present this study analytical solution modeled equation. Comparisons with direct numerical simulation data channel flows show agreement. A universal k+ deducted y+<20.
The flow in rivers is turbulent. main parameter related to turbulence the eddy viscosity, which used model a turbulent and involved determination of both velocities sediment concentrations. A well-known largely vertical distribution viscosity free surface flows (open channels rivers) given by parabolic profile that based on logarithmic velocity assumption valid therefore only log-law layer. It was improved thanks log-wake law profile. These two viscosities are obtained from profiles,...
Significant change has been observed in the water level of Lake Ziway Ethiopia which hinders its services for a wide variety ecosystems.However, contribution withdrawal and impact on lake variation not quantified yet.In this study, we conducted abstraction survey (WAS) to estimate actual from lake.Then, applied balance model coupling with simulated river inflow rainfall-runoff output data evaluate isolated 1986-2000 at monthly time steps.The amount irrigation use is 37 10 6 m 3 per year.This...
This study investigates the simultaneous distribution of suspended sediment concentration and streamwise velocity in an unsteady, uniform, one-dimensional sediment-laden open-channel flow. Theoretical models for have been developed, incorporating stratification effect through coefficients stratified diffusivity hindered settling exponent coefficient reduction. The resulting coupled partial differential equations (PDEs) are highly nonlinear nature solved numerically. results indicate that...
The success of predictions wall-bounded turbulent flows requires an accurate description the flow in near-wall region. This article presents a comparative study between different treatments and improved method. is applied to fully developed plane channel (i.e. two infinitely large plates). Simulations were performed using Fluent. Near-wall available Fluent tested: standard wall functions, non-equilibrium function enhanced treatment. A user defined (UDF), based on analytical profile for...
For mass transfer applications, CFD codes need the turbulent Schmidt number . The aim of our study is analysis some theoretical closure results and analytical formulations for We will investigate different from basic conservation equations sediment-water mixtures in open-channel flows based on a two-fluid description kinetic model. model two-phase provides which depends particle Stokes number. Our show that two approaches provide energy (TKE), eddy viscosity particles settling velocity....
We focus on the fully developed turbulent flow in circular pipes and channels. provide a comparison of mean velocity profiles, we compute values global indicators, such as skin friction, velocity, centerline displacement thickness, momentum thickness. The is done at low-to-moderate Reynolds numbers. For channel flow, deduced profiles using an indirect model; for pipe extracted needed information from direct numerical simulation database available open literature. A one-to-one these identical...