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An MCV Nonhydrostatic Atmospheric Model with Height-Based Terrain following Coordinate: Tests of Waves over Steep Mountains SCIE Scopus
期刊论文 | 2016 | ADVANCES IN METEOROLOGY | IF: 1.277
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Abstract :

A nonhydrostatic atmospheric model was tested with the mountain waves over various bell-shaped mountains. The model is recently proposed by using the MCV (multimoment constrained finite volume) schemes with the height-based terrain following coordinate representing the topography. As discussed in our previous work, the model has some appealing features for atmospheric modeling and can be expected as a practical framework of the dynamic cores, which well balances the numerical accuracy and algorithmic complexity. The flows over the mountains of various half widths and heights were simulated with the model. The semianalytic solutions to the mountain waves through the linear theory are used to check the performance of the MCV model. It is revealed that the present model can accurately reproduce various mountain waves including those generated by the mountains with very steep inclination and is very promising for numerically simulating atmospheric flows over complex terrains.

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GB/T 7714 Li, Xingliang , Shen, Xueshun , Xiao, Feng et al. An MCV Nonhydrostatic Atmospheric Model with Height-Based Terrain following Coordinate: Tests of Waves over Steep Mountains [J]. | ADVANCES IN METEOROLOGY , 2016 .
MLA Li, Xingliang et al. "An MCV Nonhydrostatic Atmospheric Model with Height-Based Terrain following Coordinate: Tests of Waves over Steep Mountains" . | ADVANCES IN METEOROLOGY (2016) .
APA Li, Xingliang , Shen, Xueshun , Xiao, Feng , Chen, Chungang . An MCV Nonhydrostatic Atmospheric Model with Height-Based Terrain following Coordinate: Tests of Waves over Steep Mountains . | ADVANCES IN METEOROLOGY , 2016 .
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An Efficient RIGID Algorithm and Its Application to the Simulation of Particle Transport in Porous Medium EI SCIE Scopus
期刊论文 | 2016 , 114 (1) , 99-131 | TRANSPORT IN POROUS MEDIA | IF: 2.205
SCOPUS Cited Count: 1
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RIGID algorithm was recently proposed to identify the contact state between spherical particles and arbitrary-shaped walls, demonstrating significantly improved robustness, accuracy and efficiency compared to existing methods. It is an important module when coupling computational fluid dynamics with discrete element model to simulate particle transport in porous media. The procedure to identify particle and surface contact state is usually time-consuming and takes a large part of the CPU time for discrete element simulations of dense particle flow in complex geometries, especially in cases with a large number of particle-wall collisions (e.g. particle transport in porous media). This paper presents a new version of RIGID algorithm, namely ERIGID, which further improves the efficiency of the original algorithm through a number of new strategies including the recursive algorithm for particle-face pair selection, angle-testing algorithm for determining particle-face relations and the smallest index filter for fast rejection and storage of time invariant. Several specially designed numerical experiments have been carried out to test the performance of ERIGID and verify the effectiveness of these strategies. Finally, the improved algorithm is used to simulate particle transport in a rock treated as a porous medium. Our numerical results reveal several important flow phenomena and the primary reason for particle trapping inside the rock.

Keyword :

Porous media Discrete element method Complex geometry Particle flows

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GB/T 7714 Su, Junwei , Huang, Chuanqing , Gu, Zhaolin et al. An Efficient RIGID Algorithm and Its Application to the Simulation of Particle Transport in Porous Medium [J]. | TRANSPORT IN POROUS MEDIA , 2016 , 114 (1) : 99-131 .
MLA Su, Junwei et al. "An Efficient RIGID Algorithm and Its Application to the Simulation of Particle Transport in Porous Medium" . | TRANSPORT IN POROUS MEDIA 114 . 1 (2016) : 99-131 .
APA Su, Junwei , Huang, Chuanqing , Gu, Zhaolin , Chen, Chungang , Xu, Xiaoyun . An Efficient RIGID Algorithm and Its Application to the Simulation of Particle Transport in Porous Medium . | TRANSPORT IN POROUS MEDIA , 2016 , 114 (1) , 99-131 .
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A high-order multi-moment constrained finite-volume global shallow-water model on the Yin-Yang grid EI SCIE Scopus
期刊论文 | 2015 , 141 (691) , 2090-2102 | QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY | IF: 3.669
WoS CC Cited Count: 2 SCOPUS Cited Count: 2
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A high-order global shallow-water model on a Yin-Yang grid has been developed by using the multi-moment constrained finite-volume (MCV) method. Unlike the traditional finite-volume method, more degrees of freedom (DOFs)-which are the values at the solution points within each mesh element-are defined and updated in time. The time evolution equations for these point values (PVs) are derived from a set of constraint conditions in terms of the so-called multi-moment quantities, such as the PV, the volume-integrated average (VIA) and derivative. Different moments use different forms of equations which are all consistent with the shallow-water equations, among which the VIA moment is computed from a finite-volume formulation of flux form that guarantees rigorous numerical conservation. A fourth-order formulation is devised with the third-order reconstruction built over each element using the DOFs locally available. A simple and orthogonal overset grid, the Yin-Yang grid, is used to represent the spherical geometry with quasi-uniform grid spacing. The resulting global shallow-water model is attractive in algorithmic simplicity and computational efficiency. The model has been validated by widely used benchmark tests. The numerical results of the present model are competitive with most existing advanced models.

Keyword :

global model Yin-Yang grid high-order scheme finite-volume method shallow-water equations multi-moment method

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GB/T 7714 Li, Xingliang , Chen, Chungang , Xiao, Feng et al. A high-order multi-moment constrained finite-volume global shallow-water model on the Yin-Yang grid [J]. | QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY , 2015 , 141 (691) : 2090-2102 .
MLA Li, Xingliang et al. "A high-order multi-moment constrained finite-volume global shallow-water model on the Yin-Yang grid" . | QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY 141 . 691 (2015) : 2090-2102 .
APA Li, Xingliang , Chen, Chungang , Xiao, Feng , Shen, Xueshun . A high-order multi-moment constrained finite-volume global shallow-water model on the Yin-Yang grid . | QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY , 2015 , 141 (691) , 2090-2102 .
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A two-layer mesh method for discrete element simulation of gas-particle systems with arbitrarily polyhedral mesh EI SCIE Scopus
期刊论文 | 2015 , 103 (10) , 759-780 | INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING | IF: 2.1
WoS CC Cited Count: 8 SCOPUS Cited Count: 11
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Abstract :

Inter-phase momentum coupling for particle flows is usually achieved by means of direct numerical simulation (DNS) or point source method (PSM). DNS requires the mesh size of the continuous phase to be much smaller than the size of the smallest particle in the system, whereas PSM requires the mesh size of the continuous phase to be much larger than the particle size. However, for applications where mesh sizes are similar to the size of particles in the system, neither DNS nor PSM is suitable. In order to overcome the dependence of mesh on particle sizes associated with DNS or PSM, a two-layer mesh method (TMM) is proposed. TMM involves the use of a coarse mesh to track the movement of particle clouds and a fine mesh for the continuous phase, with mesh interpolation for information exchange between the coarse and fine mesh Numerical tests of different interpolation methods show that a conservative interpolation scheme of the second order yields the most accurate results. Numerical simulations of a fluidized bed show that there is a good agreement between predictions using TMM with a second-order interpolation scheme and the experimental results, as well as predictions obtained with PSM. Copyright (c) 2015John Wiley & Sons, Ltd.

Keyword :

multiphase particle flows two-layer mesh method dynamic simulation discrete element method fluidization

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GB/T 7714 Su, Junwei , Gu, Zhaolin , Chen, Chungang et al. A two-layer mesh method for discrete element simulation of gas-particle systems with arbitrarily polyhedral mesh [J]. | INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING , 2015 , 103 (10) : 759-780 .
MLA Su, Junwei et al. "A two-layer mesh method for discrete element simulation of gas-particle systems with arbitrarily polyhedral mesh" . | INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING 103 . 10 (2015) : 759-780 .
APA Su, Junwei , Gu, Zhaolin , Chen, Chungang , Xu, Xiao Yun . A two-layer mesh method for discrete element simulation of gas-particle systems with arbitrarily polyhedral mesh . | INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING , 2015 , 103 (10) , 759-780 .
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A global shallow-water model on an icosahedral-hexagonal grid by amulti-moment constrained finite-volume scheme EI SCIE Scopus
期刊论文 | 2014 , 140 (679) , 639-650 | QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY | IF: 3.252
WoS CC Cited Count: 6
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A third-order global shallow-water model was developed on an icosahedral-hexagonal grid with the application of the multi-moment constrained finite-volume (MCV) method. Using the hexagonal grid, the sphere is divided into quasi-uniform elements and free of polar problems. The MCV model defines seven degrees of freedom (DOFs) as the prognostic variables which are the point values at the six vertices and the centre for each hexagonal element to construct a third-order scheme. The time evolution equations to update the DOFs are derived through the constraint conditions on different moments, i.e. the point value and the volume-integrated average (VIA) moments. Rigorous conservation is guaranteed by the constraint on the VIA through a flux form. The MCV formulation is very simple and easy to implement. We evaluated the model with benchmark tests, and the competitive results reveal the proposed model to be an accurate and practical framework for developing general circulation models.

Keyword :

multi-moment constraints shallow-water equations global model high-order scheme icosahedral-hexagonal grid

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GB/T 7714 Chen, Chungang , Bin, Juzhong , Xiao, Feng et al. A global shallow-water model on an icosahedral-hexagonal grid by amulti-moment constrained finite-volume scheme [J]. | QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY , 2014 , 140 (679) : 639-650 .
MLA Chen, Chungang et al. "A global shallow-water model on an icosahedral-hexagonal grid by amulti-moment constrained finite-volume scheme" . | QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY 140 . 679 (2014) : 639-650 .
APA Chen, Chungang , Bin, Juzhong , Xiao, Feng , Li, Xingliang , Shen, Xueshun . A global shallow-water model on an icosahedral-hexagonal grid by amulti-moment constrained finite-volume scheme . | QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY , 2014 , 140 (679) , 639-650 .
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An accurate multimoment constrained finite volume transport model on Yin-Yang grids SCIE Scopus CSCD
期刊论文 | 2013 , 30 (5) , 1320-1330 | ADVANCES IN ATMOSPHERIC SCIENCES | IF: 1.459
WoS CC Cited Count: 5 SCOPUS Cited Count: 6
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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.

Keyword :

finite volume method transport model Yin-Yang grid high-order scheme

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GB/T 7714 Li Xingliang , Shen Xueshun , Peng Xindong et al. An accurate multimoment constrained finite volume transport model on Yin-Yang grids [J]. | ADVANCES IN ATMOSPHERIC SCIENCES , 2013 , 30 (5) : 1320-1330 .
MLA Li Xingliang et al. "An accurate multimoment constrained finite volume transport model on Yin-Yang grids" . | ADVANCES IN ATMOSPHERIC SCIENCES 30 . 5 (2013) : 1320-1330 .
APA Li Xingliang , Shen Xueshun , Peng Xindong , Xiao Feng , Zhuang Zhaorong , Chen Chungang . An accurate multimoment constrained finite volume transport model on Yin-Yang grids . | ADVANCES IN ATMOSPHERIC SCIENCES , 2013 , 30 (5) , 1320-1330 .
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A Global Multimoment Constrained Finite-Volume Scheme for Advection Transport on the Hexagonal Geodesic Grid EI SCIE Scopus
期刊论文 | 2012 , 140 (3) , 941-955 | MONTHLY WEATHER REVIEW | IF: 2.758
WoS CC Cited Count: 11
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A third-order numerical model is developed for global advection transport computation. The multimoment constrained finite-volume scheme has been implemented to the hexagonal geodesic grid for spherical geometry. Two kinds of moments (i.e., point value and volume-integrated average) are used as the constraint conditions to derive the time evolution equations to update the computational variables, which are the values defined at the specified points over each mesh element in the present model. The numerical model has rigorous numerical conservation and third-order accuracy. One of the major merits of the present method is that it does not explicitly involve numerical quadrature, which leads to great convenience in accurately computing curved geometry and source terms. The present paper provides an accurate and practical formulation for advection calculation in the hexagonal-type geodesic grid.

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GB/T 7714 Chen, Chungang , Bin, Juzhong , Xiao, Feng . A Global Multimoment Constrained Finite-Volume Scheme for Advection Transport on the Hexagonal Geodesic Grid [J]. | MONTHLY WEATHER REVIEW , 2012 , 140 (3) : 941-955 .
MLA Chen, Chungang et al. "A Global Multimoment Constrained Finite-Volume Scheme for Advection Transport on the Hexagonal Geodesic Grid" . | MONTHLY WEATHER REVIEW 140 . 3 (2012) : 941-955 .
APA Chen, Chungang , Bin, Juzhong , Xiao, Feng . A Global Multimoment Constrained Finite-Volume Scheme for Advection Transport on the Hexagonal Geodesic Grid . | MONTHLY WEATHER REVIEW , 2012 , 140 (3) , 941-955 .
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Fourth order transport model on Yin-Yang grid by multi-moment constrained finite volume scheme CPCI-S Scopus
会议论文 | 2012 , 9 , 1004-1013 | International Conference on Computational Science (ICCS)
WoS CC Cited Count: 5 SCOPUS Cited Count: 6
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A fourth order transport model is proposed for global computation with the application of multi-moment constrained finite volume (MCV) scheme and Yin-Yang overset grid. Using multi-moment concept, local degrees of freedom (DOFs) are point-wisely defined within each mesh element to build a cubic spatial reconstruction. The updating formulations for local DOFs are derived by adopting multi moments as constraint conditions, including volume-integrated average (VIA), point value (PV) and first order derivative value (DV). Using Yin-Yang grid eliminates the polar singularities and results in a quasi-uniform mesh over the whole globe. Each component of Yin-Yang grid is a part of the LAT-LON grid, an orthogonal structured grid, where the MCV formulations designed for Cartesian grid can be applied straightforwardly to develop the high order numerical schemes. Proposed MCV model is checked by widely used benchmark tests. The numerical results show that the present model has fourth order accuracy and is competitive to most existing ones.

Keyword :

High order scheme Finite volume scheme Transport model Yin-Yang grid

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GB/T 7714 Li, Xingliang , Shen, Xueshun , Peng, Xindong et al. Fourth order transport model on Yin-Yang grid by multi-moment constrained finite volume scheme [C] . 2012 : 1004-1013 .
MLA Li, Xingliang et al. "Fourth order transport model on Yin-Yang grid by multi-moment constrained finite volume scheme" . (2012) : 1004-1013 .
APA Li, Xingliang , Shen, Xueshun , Peng, Xindong , Xiao, Feng , Zhuang, Zhaorong , Chen, Chungang . Fourth order transport model on Yin-Yang grid by multi-moment constrained finite volume scheme . (2012) : 1004-1013 .
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