An Accurate Multimoment Constrained Finite Volume Transport Model on Yin-Yang Grids

An Accurate Multimoment Constrained Finite

Volume Transport Model on Yin-Yang Grids

LI Xingliang;SHEN Xueshun;PENG Xindong;XIAO Feng;ZHUANG Zhaorong;CHEN Chungang

【期刊名称】《大气科学进展（英文版）》

【年(卷),期】2013(030)005

【摘要】A global transport model is proposed in which a multimoment constrained finite volume (MCV) scheme is applied to a Yin-Yang overset grid.The MCV scheme defines 16 degrees of freedom (DOFs) within each element to build a 2D cubic reconstruction polynomial.The time evolution equations for DOFs are derived from constraint conditions on moments of line-integrated averages (LIA),point values (PV),and values of first-order derivatives (DV).The Yin-Yang grid eliminates polar singularities and results in a quasi-uniform mesh.A limiting projection is designed to remove nonphysical oscillations around discontinuities.Our model was tested against widely used benchmarks; the competitive results reveal that the model is accurate and promising for developing general circulation models.

【总页数】11页(1320-1330)

【关键词】

【作者】LI Xingliang;SHEN Xueshun;PENG Xindong;XIAO Feng;ZHUANG Zhaorong;CHEN Chungang