Multiscale ocean simulations with FESOM

23 mins 1 sec, 21.08 MB, MP3 44100 Hz, 125.03 kbits/sec

Share this media item:

Embed this media item:

<iframe width="_width_" height="_height_" src="https://sms.cam.ac.uk/media/1317199/embed" frameborder="0" scrolling="no" allowfullscreen></iframe>

Choose size:

About this item

Available Formats

About this item

Description:	Sergey Danilov, (Alfred-Wegener-Institut für Polar- und Meeresforschung (AWI)) Monday 24 September 2012, 14:00-14:25


Created:	2012-09-26 15:11
Collection:	Multiscale Numerics for the Atmosphere and Ocean
Publisher:	Isaac Newton Institute
Copyright:	Sergey Danilov
Language:	eng (English)


Abstract:	Finite-Element Sea-ice Ocean circulation Model (FESOM) uses unstructured triangular meshes and is employed either as standing-alone global ocean model or as part of FESOM-ECHAM5/6 coupled setup. Several examples pertaining to studies focused on polar oceans will be given to characterize the potential of FESOM and also to indicate typical difficulties related to the strongly variable resolution. Brief intercomparison of FESOM to a global cell-vertex finite-volume setup is presented. While it is more numerically efficient than the finite-element setup of FESOM, it requires special measures to maintain stable performance because of its too large velocity space. Most effective stabilization is provided by either computing the momentum advection on scalar (median-dual) control volumes, or making use of the vector-invariant form. Both approaches effectively trim the nonlinear term in the momentum equation to the size of scalar space.

Abstract:

Finite-Element Sea-ice Ocean circulation Model (FESOM) uses unstructured triangular meshes and is employed either as standing-alone global ocean model or as part of FESOM-ECHAM5/6 coupled setup. Several examples pertaining to studies focused on polar oceans will be given to characterize the potential of FESOM and also to indicate typical difficulties related to the strongly variable resolution.

Brief intercomparison of FESOM to a global cell-vertex finite-volume setup is presented. While it is more numerically efficient than the finite-element setup of FESOM, it requires special measures to maintain stable performance because of its too large velocity space. Most effective stabilization is provided by either computing the momentum advection on scalar (median-dual) control volumes, or making use of the vector-invariant form. Both approaches effectively trim the nonlinear term in the momentum equation to the size of scalar space.

Available Formats

Format	Quality	Bitrate	Size
MPEG-4 Video	640x360	1.85 Mbits/sec	321.22 MB	View	Download
WebM	640x360	1.55 Mbits/sec	270.89 MB	View	Download
Flash Video	484x272	568.81 kbits/sec	96.45 MB	View	Download
iPod Video	480x270	506.04 kbits/sec	85.86 MB	View	Download
MP3 *	44100 Hz	125.03 kbits/sec	21.08 MB	Listen	Download
Auto	(Allows browser to choose a format it supports)