SIPW01 | Dr. Noa Kraitzman | Advection enhanced diffusion processes

Описание: SIPW01 | Dr. Noa Kraitzman | Advection enhanced diffusion processes

Speaker: Dr Noa Kraitzman (University of Utah)
Date: 12th Sept 2017 - 16:00 to 16:30
Venue: INI Seminar Room 1
Title: Advection enhanced diffusion processes
Event: (SIPW01) Multi-scale modelling of ice characteristics and behaviour
Abstract: We investigate thermal conduction in sea ice
in the presence of fluid flow,

as an important example of an advection
diffusion process in the polar

marine environment. Using new Stieltjes
integral representations for the effective diffusivity in turbulent transport, we present a series of rigorous bounds on the effective
diffusivity, obtained using Padé approximates in terms of the Péclet number. We first
analyze the effective thermal conductivity of sea ice in the presence of an averaged
convective velocity field, neglecting the two phase microstructure of sea ice, and then
present a homogenization analysis of the full two component system composed of brine and
ice.

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