Show simple item record

dc.contributor.authorOlder, Mark Elwood
dc.date.accessioned2012-11-20T00:17:34Z
dc.date.available2012-11-20T00:17:34Z
dc.date.issued1981-06
dc.identifier.urihttp://hdl.handle.net/10945/20700
dc.description.abstractMany meteorological forecast applications require the use of grids that have a high resolution in a particular area of interest, while allowing coarser resolution elsewhere. Conventional finite difference models often use nested grids to this end. In recent years, finite element models have been offered as an alternative. In this study, the two-dimensional advection equation with diffusion is defined over a rectangular domain. The Galerkin technique is applied to linear basis functions on triangular elements. The model is tested to determine the sensitivity of the forecast to various nodal geometries. Both equilateral and right triangular elements are tested. It is found that the equilateral arrangement consistently yields a superior forecast. Other tests are conducted in which the resolution is varied smoothly versus abruptly over the domain. The smoothly varying case gives results that are dramatically improved over the abruptly varying case. Among the conclusions is the fact that, for a given maximum resolution, the more slowly and smoothly the element size is changed, the better the forecast obtained.en_US
dc.description.urihttp://archive.org/details/atwodimensionalf1094520700
dc.language.isoen_US
dc.publisherMonterey, California. Naval Postgraduate Schoolen_US
dc.subject.lcshMeteorologyen_US
dc.titleA two-dimensional finite element advection model with variable resolution.en_US
dc.typeThesisen_US
dc.contributor.secondreaderNA
dc.contributor.corporateNaval Postgraduate School
dc.contributor.schoolNaval Postgraduate School
dc.contributor.departmentMeteorology
dc.description.serviceCaptain, United States Air Forceen_US
etd.thesisdegree.nameM.S. in Meteorologyen_US
etd.thesisdegree.levelMastersen_US
etd.thesisdegree.disciplineMeteorologyen_US
etd.thesisdegree.grantorNaval Postgraduate Schoolen_US
dc.description.distributionstatementApproved for public release; distribution is unlimited.


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record