On the performance of a generic length scale turbulence model within an adaptive finite element ocean model
On the performance of a generic length scale turbulence model within an adaptive finite element ocean model
复制标题
自适应有限元海洋模型中通用长度尺度湍流模型的性能
DOI:
10.1016/j.ocemod.2012.07.003
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发表时间:
2012
期刊:
影响因子:
3.2
通讯作者:
Hill J
中科院分区:
文献类型:
--
作者:
Hill J
Research into the use of unstructured mesh methods for ocean modelling has been growing steadily in the last few years. One advantage of using unstructured meshes is that one can concentrate resolution where it is needed. In addition, dynamic adaptive mesh optimisation (DAMO) strategies allow resolution to be concentrated when this is required. Despite the advantage that DAMO gives in terms of improving the spatial resolution where and when required, small-scale turbulence in the oceans still requires parameterisation. A two-equation, generic length scale (GLS) turbulence model (one equation for turbulent kinetic energy and another for a generic turbulence length-scale quantity) adds this parameterisation and can be used in conjunction with adaptive mesh techniques. In this paper, an implementation of the GLS turbulence parameterisation is detailed in a non-hydrostatic, finite-element, unstructured mesh ocean model, Fluidity-ICOM. The implementation is validated by comparing to both a laboratory-scale experiment and real-world observations, on both fixed and adaptive meshes. The model performs well, matching laboratory and observed data, with resolution being adjusted as necessary by DAMO. Flexibility in the prognostic fields used to construct the error metric used in DAMO is required to ensure best performance. Moreover, the adaptive mesh models perform as well as fixed mesh models in terms of root mean square error to observation or theoretical mixed layer depths, but uses fewer elements and hence has a reduced computational cost.
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DOI:
--
发表时间:
2004
期刊:
影响因子:
--
作者:
H. Burchard;J. Beckers
通讯作者:
J. Beckers
影响因子:
3.6
作者:
Burchard, H;Petersen, O;Rippeth, TP
通讯作者:
Rippeth, TP
影响因子:
3.7
作者:
J. Price
通讯作者:
J. Price
DOI:
10.1016/j.cma.2009.03.004
发表时间:
2009-07
影响因子:
7.2
作者:
P. Farrell;M. Piggott;C. Pain;G. Gorman;Cristy Wilson
通讯作者:
P. Farrell;M. Piggott;C. Pain;G. Gorman;Cristy Wilson
DOI:
--
发表时间:
2001
期刊:
影响因子:
--
作者:
A. Kleypas;C. Doney
通讯作者:
C. Doney