Heat transport through diffusive interfaces
Heat transport through diffusive interfaces
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DOI：
10.1002/grl.50440
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发表时间：
2013-05-28
影响因子：
5.2
通讯作者：
Radko, Timour
中科院分区：
文献类型：
--
作者：
Flanagan, Jason D.;Lefler, Angela S.;Radko, Timour
We perform a series of 3-D Direct Numerical Simulations (DNS) to assess the vertical heat transport through thermohaline staircases in the Arctic Ocean. The diagnostics of DNS, performed for the first time in the realistic parameter range, result in vertical fluxes exceeding those of extant four-thirds flux laws by as much as a factor of 2 and suggest that the 4/3 exponent may require downward revision. Through a series of equivalent 2-D DNS, we show that they are consistent with their more resource-intensive 3-D counterparts for sufficiently large density ratio (R) but underestimate heat transport for low R. Finally, we examine the role of boundary conditions in controlling the vertical heat transport. Rigid boundariesa necessary ingredient in laboratory-derived flux-lawsare shown to reduce the estimates of heat fluxes relative to the corresponding periodic boundary conditions. mined
