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1、从复杂地质地层学模型自动生成网格方法AutomatedGridGenerationFromModelsofComplexGeologicStructureandStratigraphy/};h8l/q-C-y'Y0K2F)ICarlGable,HaroldTreaseandTerryCherry1}"L&^,y6V)D＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝:
2、6}.M,a.E5s$S6L4v.b#U;c0{1S9K&a:A-rAbstract'z7C8r6~ B4t!G(c6o,E)N k Thecon
3、structionofcomputationalgridswhichaccuratelyreflectcomplexgeologicstructureandstratigraphyforflowandtransportmodelsposesaformidabletask.Withanunderstandingofstratigraphy,materialpropertiesandboundaryandinitialconditions,thetaskofincorporatingthisdataintoanumer
4、icalmodelcanbedifficultandtimeconsuming.MostGIStoolsforrepresentingcomplexgeologicvolumesandsurfacesarenotdesignedforproducingoptimalgridsforflowandtransportcomputation.Wehavedevelopedatool,GEOMESH,forgeneratingfiniteelementgridsthatmaintainthegeometricintegri
5、tyofinputvolumes,surfaces,andgeologicdataandproduceanoptimal(Delaunay)tetrahedralgridthatcanbeusedforflowandtransportcomputations. GEOMESHalsosatisfiestheconstraintthatthegeometriccouplingcoefficientsofthegridarepositiveforallelements.:U)D9f j8@5e)G(o,_9@,f5
6、K"d7h,Q4~:i3a GEOMESHgeneratesgridsfortwodimensionalcrosssections,threedimensionalregionalmodels,representsfaultsandfractures,andhasthecapabilityofincludingfinergridsrepresentingtunnelsandwellboresintogrids.GEOMESHalsopermitsadaptivegridrefinementinthreedimen
7、sions.Thetoolstoglue,mergeandinsertgridstogetherdemonstratehowcomplexgridscanbebuiltfromsimplerpieces.Theresultinggridcanbeutilizedbyunstructuredfiniteelementorintegratedfinitedifferencecomputationalphysicscodes.#c1O:S/a6}(r,r9P&o7@;`)};U5Y&M$v3GridGeneration
8、andGIS5J&B5K3i t Gridgenerationisabroadfieldwithapplicationsinaerodynamics,materialscience,biology,earthscience,chemistryandphysics,forexample.Foranyproblemwherethereisaneedtorepresentcontinuousfunctionswithdiscretepoints,orasystemofequationsneedstobesolved,
9、thefirststepisoftentoconstructadiscretetessellationoftheregion.Inapplicationswherecomplexgeometriesdonotneedtoberepresented,regularorthogonalgridsaresimplyconstructed.Whenitisimpor
