Show simple item record

dc.contributor.advisor DeBremaecker, Jean-Claude
dc.creatorWong, Peter Kin
dc.date.accessioned 2018-12-18T21:15:11Z
dc.date.available 2018-12-18T21:15:11Z
dc.date.issued 1981
dc.identifier.urihttps://hdl.handle.net/1911/103906
dc.description.abstract Many models have been used to examine subduction dip angle but none of which is both, dynamic and time dependent. Numerical models are developed to follow the thermal evolution of the subduction zone. The energy equation includes advection, the adiabatic gradient, viscous dissipation, radiogenic sources and variable diffusivity. The pressure is eliminated by combining the two momentum equations into a fourth, order stream-function equation. Both the energy and stream-function equations are solved numerically on a special non-uniform offset grid using the Altemating-Directon Implicit method. In a convection cell with Herring-Nabarro viscosity, circulation will be restricted to the left side of the cell while the descending limh is on the right. Altering the aspect ratio by changing the depth, has a much more pronounced effect on the total circulation and velocities than by changing the width. A convection cell will reorganize its circulation pattern to achieve steady-state when a highly viscous block, is "inserted” into the cell to disrupt normal circulation. Finally, the convective pattern in a system in which the boundary conditions are perpetually changing is determined by both its present boundary conditions and also by those preceding it by several millions of years.
dc.format.extent 62 pp
dc.language.iso eng
dc.title Numerical models of subduction dip angle with variable viscosity
dc.identifier.digital RICE1532
dc.contributor.committeeMember Lallemant, Hans G. Avé;Clark, Howard C.
dc.type.genre Thesis
dc.type.material Text
thesis.degree.department Earth Science
thesis.degree.discipline Natural Sciences
thesis.degree.grantor Rice University
thesis.degree.level Masters
thesis.degree.name Master of Arts
dc.format.digitalOrigin reformatted digital
dc.identifier.callno Thesis Geol. 1981 Wong
dc.identifier.citation Wong, Peter Kin. "Numerical models of subduction dip angle with variable viscosity." (1981) Master’s Thesis, Rice University. https://hdl.handle.net/1911/103906.


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record