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Engineering Commons

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Environmental Engineering

2008

2008

Articles 1 - 3 of 3

Full-Text Articles in Engineering

Effective Medium Equations For Chemotaxis In Porous Media, Francisco J. Valdes-Parada, Mark L. Porter, K. Narayanaswamy, Roseanne Ford, Brian D. Wood Dec 2008

Effective Medium Equations For Chemotaxis In Porous Media, Francisco J. Valdes-Parada, Mark L. Porter, K. Narayanaswamy, Roseanne Ford, Brian D. Wood

Francisco J. Valdes-Parada

Biodegradation is an important mechanism for contaminant reduction in groundwater environments; in fact, in-situ bioremediation and bioaugmentation methods represent alternatives to traditional methods such as pump-and-treat. Chemotaxis has shown to enhance bacterial transport toward or away from concentration gradients of chemical species in laboratory experiments and can signifficantly increase contaminant flux undergoing degradation at the interfaces of lowand high-permeability regions. In this work, the method of volume averaging is used to upscale the microscale description of chemotactic microbial transport in order to obtain the corresponding macroscale equations for bacteria and the attractant. As a first apprach, cellular growth/death and consumption …


Separation Of Time Scales For Transient Dispersion, Mark L. Porter, Francisco J. Valdes-Parada, Brian D. Wood Dec 2008

Separation Of Time Scales For Transient Dispersion, Mark L. Porter, Francisco J. Valdes-Parada, Brian D. Wood

Francisco J. Valdes-Parada

No abstract provided.


Modelado Matemático En Ingeniería, Francisco J. Valdes-Parada Oct 2008

Modelado Matemático En Ingeniería, Francisco J. Valdes-Parada

Francisco J. Valdes-Parada

En esta plática se discute de una manera sencilla la importancia que tiene el modelado matemático en Ingeniería. Para ello, se presenta una visión personal sobre el papel que juegan asignaturas como fenómenos de transporte y termodinámica en la formación de licenciatura y posgrado en Ingeniería. Más aún, con el objetivo de ilustrar la importancia de los cambios de escala que frecuentemente aparecen en Ingeniería, se analiza el caso del flujo de un soluto a través de tubos capilares. De esta manera, se tiene un sistema donde a escala microscópica son relevantes la difusión (radial y axial) y convección (axial) …