[Faculty] [MathProf] [MathStatFac] CSRC-Summer Colloquium Series

[Jose Castillo]

This Friday at 3:00pm GMCS 314, sorry

On Tue, Jun 6, 2017 at 12:58 AM, Jérôme Gilles <jgilles at mail.sdsu.edu>
wrote:

> when? where?
>
> 2017-06-06 3:42 GMT+02:00 Jose Castillo <jcastillo at mail.sdsu.edu>:
>
>>
>> *Validation of the General Curvilinear Coastal Ocean Model (GCCOM) for
>> the case of 3D Nonhydrostatic Stratified Flow.*
>>
>> *Mariangel Garcia, PhD*
>> *Research Associate*
>> *Computational Science Research Center*
>>
>>
>> We present the stratified nonhydrostatic capabilities of the General
>> Curvilinear Coastal Ocean Model (GCCOM), which is a 3D Navier Stokes model
>> that has the ability to run in a fully three-dimensional general
>> curvilinear coordinate system. Earlier versions of this model were
>> described for flow over complex terrain; however, these earlier versions
>> treated stratification with a simplified buoyancy forcing term and did not
>> explicitly take into account hydrostatic pressure gradients. The latest
>> version of this model more accurately computes the density effects by
>> removing the buoyancy term and adding a horizontal pressure gradient force
>> that arises from the hydrostatic component of pressure. This
>> representation, more accurately captures gravity-driven flows and internal
>> waves. Furthermore, the pressure solver was updated to a multigrid solver,
>>  to allow for a lower computational cost. GCCOM has also demonstrated the
>> ability to nest within a regional hydrostatic model, allowing for the
>> efficient simulation of multiscale processes, and it includes a data
>> assimilation framework.
>>
>> In this contribution, we focus on the validation of the nonhydrostatic
>> capabilities of the model in a stratified environment. In particular, we
>> use a suite of test cases widely used as benchmarks for assessing the
>> nonhydrostatic capabilities for gravity-driven flows and internal waves.
>> The numerical experiments  include an internal seiche, a lock release, and
>> a tidally-forced stratified flow over a seamount aimed at investigating the
>> formation of internal wave beams. Our results collectively demonstrate the
>> accuracy of GCCOM for these types of flows.
>>
>>
>> Sponsored by the SDSU-SIAM  Student Chapter
>>
>> --
>>
>> Jose E. Castillo  Ph.D.
>>
>> Director / Professor
>>
>> Computational Science Research Center
>>
>> 5500 Campanile Dr
>>
>> San Diego State University
>>
>> San Diego CA 92182-1245
>>
>> 619 5947205 <(619)%20594-7205>/3430, Fax 619-594-2459 <(619)%20594-2459>
>>
>>  http://www.csrc.sdsu.edu/mimetic-book/
>>
>
>
>
> --
> Dr. Jerome Gilles
> Assistant Professor
> Department of Mathematics and Statistics
> San Diego State University
> 5500 Campanile Drive, GMCS 589
> San Diego, CA 92182-7720, USA
> Tel: 619-594-7240 <(619)%20594-7240>
> Fax: 619-594-6746 <(619)%20594-6746>
> email: jgilles at mail.sdsu.edu
> web: http://jegilles.sdsu.edu/ <http://www-rohan.sdsu.edu/~jegilles/>
>



-- 

Jose E. Castillo  Ph.D.

Director / Professor

Computational Science Research Center

5500 Campanile Dr

San Diego State University

San Diego CA 92182-1245

619 5947205/3430, Fax 619-594-2459

 http://www.csrc.sdsu.edu/mimetic-book/
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