Simulation of Hydrate Formation and Dissociation
The primary goal of this project is to provide a fundamental understanding of flow conditions of hydrate dissociation products in consolidated and unconsolidated sediment. We also will develop semi-analytical computational models to be used as tools to guide the safety related issues. These include predicting the rate of natural gas pressure buildup during drilling in a hydrate reservoir, the nature of gas and water flows in the reservoir after hydrate dissociation, and the potential for sea floor instability. Availability of such an understanding, detailed experimental data and a computational tool are crucial to the future development of technology for economical and safe natural gas production from hydrate in the 21^st century.

Simulation of Outdoor Emissions in Street Canyons
Automotive exhaust is one major source of air pollution in street canyons of major cities. In this work the dispersion of gaseous and particulate exhaust emissions in a street canyon are studied. The Reynolds stress transport model (RSM), K-E model, and large eddy simulation (LES) of FLUENT™ software package are used and the airflow and thermal conditions in the street canyon are evaluated for both two and three dimensional cases. The nature of the pollutant dispersion in the canyon is studied. It is shown that under certain conditions the pollutants may be trapped in the street canyons. Variations of transport and deposition of particulate pollutants with size and particle relaxation time are also studied.

Simulation of Single and Multiphase Flows in Fractured Rocks
Multiphase flow in fractured rocks occurs in various situations, such as movement of pollutants(radioactive waste), gas formed in an initially water-saturated system, transport of dissolved contaminants through wetting layers in unsaturated zones, and migration of dense non-aqueous phase liquids through fractured rock. Oil reservoirs are extensively fractured, and understanding of how oil and water move through the fractures is essential for the design of oil recovery systems. In this work, two and three dimensional models of fractured rocks are modeled and multiphase flow of water and gas inside the cracks are numerically solved using the FLUENT™ software package.

Simulation of Indoor Air Pollution
Air quality control has been paid much attention in the last thirty years to reducing the outdoor pollution, but only recently has the international scientific community worried about reducing the contamination of the air of closed environments. There are many sources of indoor air pollution. Tobacco smoke, cooking and heating appliances, and vapors from building materials, paints, furniture, etc. cause pollution inside buildings. Outdoor pollutant control is another major problem. Each year, hundreds of millions of tons of gases and particulates pour into the atmosphere. Most of this pollution results from the burning of fuel to power motor vehicles and heat buildings. In this regard, a CFD model of a house with multiple rooms is generated and concentration of gaseous and particulate pollutants are evaluated.

Simulation of Fluidflow in a Porous Flowcell
Carbon dioxide released during fossil fuel consumption is a major source of greenhouse gases. In order to manage the future climatic changes, the CO2 must be removed from the flue gas and be permanently stored. The Kyoto protocol has made reducing CO2 emission in order to control the overall levels of carbon dioxide in the atmosphere, an international priority. Several methods for CO2 sequestration in the ocean floor and in geological formations have been proposed. The sequestration in geological formations including depleted oil and gas reservoirs, coal seams, and deep brine-fields have been studied. Among these, pumping CO2 into reservoirs has been exploited commercially in the US for enhanced oil recovery.

Courses - 2005 Courses - 2004

Posters and Presentation

Copyright @ Kambiz Nazridoust, 2005