flow modeling Articles

  • Modeling Tip: Importing & Exporting Traffic Data in CALRoads View

    The CALINE series of models was developed to estimate pollutant concentrations from motor vehicles at roadway intersections. It includes three primary models: CALINE, CAL3QHC, and CAL3QHCR. The latter allows processing of real meteorological data (up to one year) and input of vehicular emissions, traffic volume, and signalization (ETS) data. Data reflecting traffic conditions for individual hours ...


    By Lakes Environmental Software

  • Senix Water Level Sensors Drive Irrigation Automation Project

    Australia’s Water Crisis Irrigation management is serious business in Australia especially within the Murray-Darling Basin, a 1,000,000 square kilometer watershed that is home to Australia’s most productive agricultural land. The basin’s 23 rivers have ...


    By Senix Corporation

  • 10 things you need to know about the circular economy

    10 things you need to know about the circular economy A working circular economy could be a practical solution to the planet’s emerging resource problems. Here’s 10 facts you should know. 1. Why do we need one? The circular economy is touted as a practical solution to the planet’s emerging resource crunch. Reserves of key resources such ...


    By GPT Waste Management Ltd

  • Determining Proper Cooling Tower Size

    To maximize water-based cooling tower benefits, the appropriate tower size must be selected, requiring the identification of several critical factors. Cooling towers are a relatively inexpensive and reliable way of expelling heat from a number of industrial processes, including nuclear & thermal power plants, petroleum refineries, petrochemical plants, food processing plants, as well as HVAC ...


    By Delta Cooling Towers, Inc

  • Two Detector Solution to Analyzing Sulfur

    Sulfur compounds are reactive, corrosive to pipes, and destructive to catalysts in petroleum refineries. Sulfur emission are strictly regulated globally. When released into the atmosphere sulfur dioxide converts to sulfuric acid resulting in adverse effects on human health and the environment. Sulfur detection is found useful in many other industries; therefore, detection of sulfur compounds in ...


    By Restek Corporation

  • Modelling of unsteady cavitating flow

    A 2D numerical model is proposed in this paper to simulate unsteady cavitating flows around hydrofoil NACA66mod. The objective of this study is to define a numerical procedure to model the unsteady cavitating flow. The Reynolds–averaged Navier–Stokes equations are solved for the liquid and vapour mixture, which is considered as a single fluid with variable density which is expressed as function ...


    By Inderscience Publishers

  • Modelling of groundwater flow and heat transport

    Client: Transport for London Location: London Services: Groundwater Modelling Issues: Identifying the potential effects of pumping excess heat to the Chalk aquifer Summary: ESI was commissioned to test the feasibility of one of the possible solutions identified to prevent temperatures on the ...

  • Modeling overland flows in InfoWorks CS

    A new tool within InfoWorks CS v7.5 enables the presentation of flood depths within the bounds of a polygon, otherwise known as a flood compartment. The flood level can be extended throughout the boundaries of the compartment, allowing it to be matched against a ground model to calculate flood depth. The new tool does not alter the way in which flood calculations are undertaken, it is instead a ...


    By Innovyze

  • A survey of material flows in economic models

    Various types of economic model address environmental problems. This article examines whether these can be applied to the analysis of material flows. It is important to know which types of model are most suitable to deal with particular economic, environmental or physical aspects of material flows. For this purpose five main categories of models are considered, namely economic models of natural ...


    By Inderscience Publishers

  • Surfactant-induced unsaturated flow: Instrumented horizontal flow experiment and hysteretic modeling

    Organic compounds with surface-active properties reduce the surface tension of water and can change soil water contact angles depending on their aqueous concentration. The presence of such compounds in the unsaturated zone affects soil moisture characteristics and unsaturated hydraulic conductivity relations, and can cause flow as a result of induced soil water pressure gradients. Some studies ...

  • Modelling of atmospheric flow and dispersion in the wake of a cylindrical obstacle

    The computational fluid dynamics code ADREA–HF is used to simulate atmospheric dispersion field experiments around an isolated cylindrical obstacle and two upwind sources of ammonia and propane, with the ammonia source located at different lateral positions. Model calculated concentrations and concentration fluctuations are compared with the experimental results, to investigate the effect of the ...


    By Inderscience Publishers

  • Modelling aerated flows with smoothed particle hydrodynamics

    Modelling aerated flows is a complex application of computational fluid dynamics (CFD) since the interfaces between air and water change rapidly. In this work, the simulation of aerated flows with the smoothed particle hydrodynamics (SPH) method is investigated with a focus towards the application in engineering practice. To prove the accuracy of the method, the processes of air entrainment and ...


    By IWA Publishing

  • A dataset for the validation of flow and dispersion models at an urban intersection

    Dispersion modelling concerning air pollution caused by road traffic is reduced to a two-dimensional problem within street canyons. However, significant pollution loads are also to be expected at intersections. In this case, three-dimensional flow and dispersion structures have to be considered. For the validation of models claimed to be applicable to intersections, measurements of meteorological ...


    By Inderscience Publishers

  • Mathematical modelling of a hydraulic controller for PRV flow modulation

    This paper describes the development of mathematical models, which represent static and dynamic properties of the AQUAI-MOD® hydraulic controller coupled with a standard pressure reducing valve (PRV) as well as a new experimental set-up for testing the controller and calibrating and validating the models. The purpose of the AQUAI-MOD® controller is to modulate the PRV outlet pressure according to ...


    By IWA Publishing

  • Thermal energy flow modelling in a typical university classroom

    In order to develop solutions for reducing energy consumption, an evaluation was made of the Civil Engineering Department building in the Isfahan University of Technology (IUT). As a part of this analysis, governing equations of mass, momentum and energy transport were used to model the heat flow in a typical classroom. The model was developed using finite element numerical method. The results of ...


    By Inderscience Publishers

  • CFD modelling of electrohydrodynamic gas flow in an electrostatic precipitator

    Modelling of the flow velocity fields for electrohydrodynamic flow in a wire-to-plate type electrostatic precipitator was achieved. From calculations for the flow employing different flow models, the Chen-Kim k − ε turbulent model appeared to be the most appropriate choice to obtain a quantitative image of the resulting mean flow field and downstream wake flow of the rear wire, although this was ...


    By Inderscience Publishers

  • Modelling overland flows and drainage augmentations in Dubbo

    Introduction: Dubbo has experienced a number of overland flooding problems at several locations within the city. Council had formulated possible augmentation works to address the problems and was keen to confirm that the proposed works would address the local flooding problems. The drainage system in Dubbo faces a number of challenges due to the relatively flat grades on stormwater drainage ...


    By XP Solutions

  • Modelling the air flow in symmetric and asymmetric street canyons

    The main objective of this paper is to describe flow features in sequences of two-dimensional street canyons. Several configurations of symmetric and asymmetric canyons are studied by CFD modelling. Streets with different aspect ratios (W/H), where W is the width of street and H is the building height, are investigated. In asymmetric situations, one building (in the central canyon) is taller (30 ...


    By Inderscience Publishers

  • Modeling phototrophic biofilms in a plug-flow reactor

    The use of phototrophic biofilms in wastewater treatment has been recognized as a potential option for development of new reactor configurations. For better understanding of these systems, a numerical model was developed including relevant microbial processes. As a novelty, this model was implemented in COMSOL Multiphysics, a modern computational environment for complex dynamic models. A ...


    By IWA Publishing

  • Towards a model evaluation protocol for urban scale flow and dispersion models

    This paper reports on the stages forming a model evaluation protocol for urban flow and dispersion models proposed within the COST Action 732 on "Quality Assurance and Improvement of Micro–Scale Meteorological Models". It discusses the different components forming model evaluation with emphasis on validation and implementation of the protocol for the test case Mock Urban Setting Test (MUST). The ...


    By Inderscience Publishers

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