Atmospheric Diffusion Articles & Analysis: Older
28 articles found
It includes direct (from the sun) + diffuse (scattered from the atmosphere) radiation. It is used especially in meteorological assessments and long-term production forecasts.POA (Plane of Array Irradiance):Panel tilt and orientation (azimuth) are taken into account. ...
Interior Vertical Garden Decor A vertical garden was designed for a restaurant with Gro-Wall 4.5 to lift the atmosphere as well as diffuse the noise reflected by the walls, floors and ceiling. ...
Oxygen can be replenished from the surface through diffusion from the atmosphere as well as limited production from photosynthesis. ...
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It reflects the balance between oxygen consumption and replenishment through processes like photosynthesis and atmospheric diffusion. Here are some key points highlighting the importance of dissolved oxygen in water quality assessment: Indicator of Ecosystem Health: High dissolved oxygen levels indicate a well-oxygenated environment, supporting diverse aquatic ...
Only 47% of the solar energy that bombards the earth daily actually reaches the surface of our planet, with high volumes of EM radiation being lost to absorption and diffusion of molecules in the atmosphere, as well as reflection off our ozone layer. ...
Vertical temperature distribution is a parameter that determines atmospheric dynamics, cloud formation and diffusion of pollution gases, so a system that simultaneously measures aerosols and temperatures has direct commercial application to meteorology and research. ...
Sometimes the function of the MABR’s membrane is compared to the human lung‘s. Oxygen at atmospheric pressure diffuses through the membrane wall and feeds the aerobic digestion without bubbles. ...
A lesser but also important source of oxygen in water is diffusion from the atmosphere, which is enhanced by wind-induced surface water turbulence. ...
A dispersion model for continuous releases of pollutants in the atmospheric boundary layer is applied to study the influence on modelled concentrations of different estimates of the key micrometeorological variables that represent the dispersion processes. The modelling approach is based on the advection-diffusion equation and includes profiles of wind and eddy ...
Thus, the urban air quality can be improved based on adjustment of street geometry.Keywords: atmospheric diffusion, CFD models, structural geometry, vehicle ...
These analyses are important for proper environmental management and contribute to traffic engineers seeking environmentally sustainable solutions.Keywords: environmental pollution, atmospheric diffusion, pollution dispersion, signalised intersection, roundabout, vehicular ...
Furnas Volcano is a dormant central volcano located in the eastern part of São Miguel Island (Azores archipelago, Portugal). The last volcanic eruption in this volcanic system took place in 1630 causing about 200 victims. Present–day activity comprises fumarolic fields, thermal and cold CO2–rich springs and soil diffuse degassing areas. CO2 diffusely released from the volcano soils was estimated ...
Using the micrometeorological parameters generated by large eddy simulation, for the first time, we employ the vertical component of the energy spectrum to calculate the eddy diffusivity (required in dispersion models). This new eddy diffusivity is used in the GILTT approach to simulate ground-level concentrations considering experimental data of Angra I Nuclear ...
In this work, we report a numerical and statistical comparison between Advection-Diffusion Multilayer Method (ADMM) and Generalised Integral Laplace Transform Technique (GILTT) approaches to simulate a radioactive pollutant dispersion in the Atmospheric Boundary Layer (ABL) using micrometeorological parameters generated by Large Eddy Simulation (LES). ...
This paper discusses the main principles of atmospheric diffusion modelling for regulatory purposes in Russia. They include the choice of air quality criteria, the development of universal models to calculate on a single base the dispersion of atmospheric pollutants from different types of source under unfavourable meteorological and ...
The LOSTRAC software is devoted to real-time tracking of accidental atmospheric releases. It allows one to calculate, within a few minutes from the moment when the accident is reported and localised, displacement and diffusion of atmospheric pollution. ...
The model predictions of maximum plume centreline concentrations show a mean bias of less than l0%, a typical error that is about 50% of the mean, and a correlation of about 0.5.Keywords: atmospheric diffusion, model evaluation, plume rise, plume dispersion, power plants, atmospheric dispersion models, environmental impact assessment, ...
Russian regulatory diffusion models are based on the concept of worst-case fields of concentration. ...
Studies of the transport and dispersion of atmospheric pollutants at the scale of a part or the whole of an urban agglomeration require numerical simulations over domains between a few kilometres and a few tens of kilometers (sub-meso scale to meso-y scale). Current computer capabilities do not allow for a grid resolution sufficiently fine to explicitly simulate the flows at the ...
A practical model for evaluating ground-level concentrations from elevated sources that applies a new Gaussian formulation for transport and vertical diffusion is presented. In the Gaussian formula, the source height is replaced by a virtual source height, which is expressed by simple functions of the vertical profiles of wind and turbulent diffusivity. The ...