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Numerical Flow Modeling Articles & Analysis
37 articles found
Introduction: Why Chloride Plumes Behave Differently Chloride contamination presents a unique challenge in groundwater systems. Unlike many organic contaminants, chloride does not degrade, volatilize, or readily bind to soil. Once introduced into the subsurface, it moves with groundwater, often persisting for decades. ...
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Advanced monitoring and modeling techniques are improving torrent barrier design to better manage flooding in the Alps. Torrent barriers are crucial in managing the flow of water and sediment in mountainous regions, particularly in the Alps, where climate change is increasing the frequency and intensity of torrential rain events. These structures prevent the buildup of sediment that can ...
Project work began with the extension and refinement of a model originally developed for the Oak Ridges Moraine. The model layers were expanded to include the main units of the Niagara Escarpment. The numerical groundwater flow model was built using the US Geological Survey MODFLOW code. A model ...
Based on analysis of the resulting data, wells were designed and submersible pumps with variable frequency drives were installed. Two 3-dimensional numerical groundwater flow models were constructed: a “sub-regional” model to simulate the long-term effects of dewatering on aquifer conditions and on local rivers ...
Countercurrent–cocurrent dissolved air flotation (CCDAF), the popular water purification device, which consists of collision and adhesion contact zones, showed favorable flotation conditions for micro-bubble adhesion and stability. In this study, computational fluid dynamics (CFD) numerical simulation was employed to confirm that the unique CCDAF configuration create reasonable and that the ...
Furthermore, this model provides the premise and possibility of a full-scale simulation of the spillway flow, that is, it can not only be used to study the hydraulics on the spillway face, but also can be used to study the hydraulics along the downstream river channel and estimate the scour problem associated with both the spillway flow and ...
In the present paper, vertical drops, backdrops and stepped drops were modelled using the computational fluid dynamics (CFD) code FLOW-3D® to evaluate the air-water flows due to the turbulence induced by the presence of these types of structures. An assessment of the hydraulic variables and an analysis of the air entrainment based on the ...
A surrogate modeling framework is developed in this study to circumvent the computational burden of high-fidelity numerical groundwater models for arid coastal aquifers. Two different surrogate models, namely, artificial neural network (ANN) and Gaussian process model (GPM) are trained to replace the ...
The final model is applied for simulation of flow over the 45° and 60° ogee spillways (with different inflow rates) and also shallow flow over a spillway-like curved bed channel. To evaluate the model, the numerical results of free surface profile and velocity and pressure field are compared with the available ...
A two-dimensional numerical model predicting flow over a mobile bed has been developed. Governing equations consist of the shallow water equations and the Exner equation. ...
A two-dimensional numerical model predicting flow over a mobile bed has been developed. Governing equations consist of the shallow water equations and the Exner equation. ...
Enhanced oil recovery, including gas injection, may be an essential process to increase the recovery factor and maximise the potential production from this formation. A numerical reservoir simulator is used to evaluate the performance of CO2 injection for the Bakken interval in a sector of the Sanish field. Future primary production performance of wells in the research area was ...
In this paper, details of a numerical model development for simulation of fluid flows with moving free surface are presented. The unsteady incompressible Navier–Stokes equations on a fixed grid system are used to obtain velocity and pressure values in the computational domain and volume of fluid (VOF) method is used to determine free ...
This paper reviews recent findings in the field of flow and pollutant dispersion modelling around buildings and within complex urban geometries. Complexity is not only associated to the packing density of buildings, but originates also from building-height variability, buoyancy effects close to the building walls, traffic-produced turbulence and from the presence of vegetation. Recent results ...
These considerations require predictive management that will limit water height downstream. In the literature, numerous works have described flow modeling and management. The work presented in this paper is interested in quantitative management by means of flood expansion areas placed along the river and for which we have size and location. ...
In this paper, double flow packed bed solar air heater was investigated theoretically and experimentally. A numerical model for the air heater was presented. Numerical calculations had been performed under Hamirpur (latitude, 31°25' to 31°52' North) prevailing weather conditions. ...
Field data from an ATES site in the south of the Netherlands show that ATES results in chemical quality perturbations due to homogenisation of the initially present vertical water quality gradient. We tested this hypothesis by numerical modelling of groundwater flow and coupled SO4 transport during extraction and injection of groundwater by the ...
In the study area, rational management of groundwater resources requires a precise evaluation of groundwater flow and transport components. For this purpose, a 2–dimentional groundwater flow and solute transport model was developed and calibrated using PMWIN 5.3. Simulation results under steady–state and transient conditions show that ...
Particle dispersion in a classroom under mixing ventilation, displacement ventilation and stratum ventilation respectively are investigated by numerical simulation. The drift–flux model based on an Eulerian–Eulerian approach is adopted to simulate the particle movement in a room. The results show that the flow patterns created by ...
To allow for a robust and fast operation we unified process modelling with artificial intelligence tools and evolutionary optimisation techniques. The aquifer behaviour is represented using an artificial neural network (ANN) which emulates a numerical density-dependent groundwater flow model. The impact of agriculture is ...