# Stratified ECS at high Prandtl number

**URL:** <https://discourse.channelflow.ch/t/stratified-ecs-at-high-prandtl-number/63>\
**Category:** Results\
**Created:** [April 19, 2019, 7:55am UTC](https://discourse.channelflow.ch/t/stratified-ecs-at-high-prandtl-number/63 "2019-04-19T07:55:47Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![jlangham](https://avatars.discourse-cdn.com/v4/letter/j/a88e4f/32.png) [@jlangham](https://discourse.channelflow.ch/u/jlangham)\
**Post date:** [April 19, 2019, 7:55am UTC](https://discourse.channelflow.ch/t/stratified-ecs-at-high-prandtl-number/63/1 "2019-04-19T07:55:47Z")

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Hi all,

We have a paper out on arXiv in which some of the computations were done with Channelflow 2.0 modified to support density stratification.

[https://arxiv.org/abs/1904.04853](https://arxiv.org/abs/1904.04853)

It is mainly about the generic tendency of the density field to homogenise in the channel interior at high Pr (= O(100)) and the corresponding formation of boundary layers and interfaces, but there are some low Pr calculations too.

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**Author:** ![arshankhaniitr](https://avatars.discourse-cdn.com/v4/letter/a/8491ac/32.png) [@arshankhaniitr](https://discourse.channelflow.ch/u/arshankhaniitr)\
**Post date:** [March 22, 2020, 6:31pm UTC](https://discourse.channelflow.ch/t/stratified-ecs-at-high-prandtl-number/63/2 "2020-03-22T18:31:42Z")

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Have you checked the validity if the results for large value of Reynolds number (O(10^4 or 10^5))?. Whether the results for such a large are correct or not?

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**Author:** ![jlangham](https://avatars.discourse-cdn.com/v4/letter/j/a88e4f/32.png) [@jlangham](https://discourse.channelflow.ch/u/jlangham)\
**Post date:** [March 22, 2020, 7:25pm UTC](https://discourse.channelflow.ch/t/stratified-ecs-at-high-prandtl-number/63/3 "2020-03-22T19:25:15Z")

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Hi,

For the most part, high Re behaviour is covered by SSP/VWI-type analyses and we make some of these asymptotic arguments in the paper. There are a few numerical results at high Re (1e5 if I remember correctly) at the end too which may be of interest.