Xin Liu

Scientifique en Physique, Recherche

Modélisation hydraulique, Prévision numérique du réseau hydrographique, Élaboration de modèles numériques, Modélisation de rivières, Maintenance de suites de simulation numériques

Environnement et Changement climatique Canada

Recherche et / ou projets en cours

Recherche et développement sur les prévisions numériques dans le bassin versant des Grands Lacs et du fleuve St. Laurence

Énoncés de recherches/projets

Mes intérêts de recherche couvrent les domaines de la mécanique hydrodynamique, morphodynamique et environnementale / chimique des fluides. Mes recherches ont pour fil conducteur la compréhension de la théorie, la conception d’algorithmes et de modèles numériques et la réalisation de simulations et d’analyses numériques. Pour résoudre numériquement les problèmes d'ingénierie et de mécanique, j'ai eu recours à des méthodes mathématiques allant de la résolution d'équations aux dérivées partielles (EDP) aux équations différentielles ordinaires (ODE), à la géométrie et aux statistiques.

Je suis particulièrement intéressé par les sujets de recherche suivants:

Hydraulique computationnelle
Modélisation océan / rivière / atmosphère
Transport des sédiments et modélisation morphodynamique
Méthodes numériques pour les équations différentielles partielles / ordinaires

Activités professionnelles / intérêts

Professeur adjoint, Département de génie civil, Université d'Ottawa

Prix et études

Éducation:

Ph.D.   Génie de l'environnement, Université d'Ottawa, Canada        2011-2016
M.S.     Génie chimique, Hebei Université de Technologie, Chine   2008-2011
B.S.     Génie chimique, Hebei Université de Technologie, Chine   2004-2008

Récompenses et Honneurs:

SUSTech prix du président pour un excellent boursier postdoctoral: 2018-2019
Bourse STIP de Ressources Naturelles Canada: 2016-2017
Nomination du prix Pierre Laberge, Uottawa: 2016
Bourse du doyen d'études supérieures de l'Université d'Ottawa: 2016
Régime de bourses d’études supérieures de l’Ontario: 2015-2016
Bourses d’études supérieures de la Reine Elizabeth II en sciences et technologie: 2014-2015
Bourses d’études supérieures de la Reine Elizabeth II en sciences et technologie: 2012-2013
Bourses d'excellence aux études supérieures/Bourse d'admission de l'Université d'Ottawa: 2011-2016

Expérience et / ou de travail international

Scientifique en Physique, Recherche: Prévisions Numériques Environnementales, Environnement et Changement climatique Canada/Gouvernement du Canada, Dorval, Québec, Canada 2019.08-présent

Chercheur postdoctoral: Département de mathématiques, Southern University of Science and Technology, Shenzhen, Chine 2017.10-2019.07

Chercheur invité: Département de mathématiques, Southern University of Science and Technology, Shenzhen, China 2017.07-2017.09

Interne: Département de génie civil, Université d'Ottawa, Ottawa, Canada 2016.09-2017.05

Principales publications

[34] X. Liu, J. He. "A novel well-balanced numerical model for water-solute mixture underflows coupled with ambient water." Submitted.

[33] X. Liu. "A three-stage third-order low-dissipation and low-dispersion explicit exponential Runge-Kutta Method." Submitted.

[32] X. Liu. "New Partially-Relaxed Path-Conservative Numerical Scheme for A Two-Layer Hydro-Sediment-Morphodynamic Model." To appear in Journal of Hydraulic Engineering.

[31] X. Liu, S. Chen. "Improved modelling of flows in sewer pipes with a novel well-balanced MUSCL scheme." Journal of Hydraulic Engineering 148, 12(2022).

[30] A. Chertock, A. Kurganov, X. Liu, Y. Liu, T. Wu. "Well-Balancing Via Flux Globalization: Applications to Shallow Water Equations with Wet/Dry Fronts." Journal of Scientific Computing 90, 9(2022).

[29] X. Liu. "A New Well-Balanced Finite Volume Scheme on Unstructured Grids for Two-dimensional Two-layer Shallow Water System." Journal of Computational Physics, 438(2021)

[28] X. Liu. "A well-balanced numerical model for depth-averaged two-layer shallow water flows." Computational and Applied Mathematics, 40, 311(2021).

[27] S. Chen, F. Zheng, X. Liu. "Augmented HLL Riemann solver including slope source term for 1D mixed pipe flows." Journal of Hydroinformatics, 23 (4) (2021): 831–848.

[26] S. Chen, F. Zheng, X. Liu, P. Garamb. "Pressure-balanced Saint-Venant equations for improved asymptotic modelling of pipe flow." Journal of Hydro-environment Research, 37(2021): 46-56.

[25] X. Liu, S. Chen. "Discussion of 'A remark on finite volume methods for 2D shallow waterequations over irregular bottom topography' by Cristo et al., Journal of Hydraulic Research(2020):1-8." Journal of Hydraulic Research, 59(2021): 1036-1037.

[24] X. Liu. "A Well-balanced and Positivity-preserving Numerical Model for Shallow Water Flows in Channels with Wet-dry Fronts." Journal of Scientific Computing, 85 60(2020).

[23] X. Liu. "A Steady-State-Preserving Scheme for Shallow Water Flows in Channels." Journal of Computational Physics , 423C(2020): 109803.

[22] X. Liu. "A Well-Balanced Asymptotic Preserving Scheme for the Two-Dimensional Shallow Water Equations over Irregular Bottom Topography." SIAM Journal on Scientific Computing, 42(5)(2020): B1136–B1172.

[21] X. Liu, X. Chen, S. Jin, A. Kurganov, T. Wu, H. Yu. "Moving-Water Equilibria Preserving Partial Relaxation Scheme for the Saint-Venant System." SIAM Journal on Scientific Computing, 42(4), (2020): A2206-A2229

[20] X. Liu, A. Chertock, A. Kurganov, K. Wolfkill. "One-Dimensional/Two-Dimensional Coupling Approach with Quadrilateral Confluence Region for Modeling River Systems." Journal of Scientific Computing, (2019): 1-32.

[19] X. Liu, A. Chertock, A. Kurganov. "An Asymptotic Preserving Scheme for Two Dimensional Shallow Water Equations with Coriolis Force." Journal of Computational Physics, 391(2019): 259-274.

[18] X. Liu. "A Robust Numerical Model for Solute Transport in the Shallow Water System with Wet/Dry Interfaces." Computer Methods in Applied Mechanics and Engineering, 351(2019): 85-108.

[17] X. Liu. "A Highly Efficient Numerical Method for Rotating Oceanographic Flows Modeled by Saint-Venant System with Coriolis Forces" Communications in Computational Physics, 25 (2019): 1394-1412.

[16] X. Liu, J. Albright, Y. Epshteyn, A. Kurganov. "Well-Balanced Positivity Preserving Central-Upwind Scheme with a Novel Wet/Dry Reconstruction on Triangular Grids for the Saint-Venant System." Journal of Computational Physics, 374 (2018): 213-236.

[15] X. Liu, J. A. Infante Sedano, A. Mohammadian. "Closure to 'A coupled two-dimensional numerical model for rapidly varying flow, sediment transport and bed morphology' by XIN LIU, JULIO ANGEL INFANTE SEDANO and ABDOLMAJID MOHAMMADIAN, J. Hydraulic Res. 53(5), 2015, 609-621." Journal of Hydraulic Research, 56(5), (2018): 751-752.

[14] X. Liu, A. Beljadid. "A coupled numerical model for water flow, sediment transport and bed erosion." Computers & Fluids, 154 (2017): 273-284.

[13] X. Liu, A. Mohammadian, J. A. Infante Sedano. "A numerical model for three-dimensional shallow water flows with sharp gradients over mobile topography." Computers & Fluids, 154C (2017): 1-11.

[12] X. Liu, A. Mohammadian, J. A. Infante Sedano. "Numerical modelling of submarine turbidity currents over erodible beds using unstructured grids." Ocean Modelling, 113(2017): 157-170.

[11] X. Liu, A. Mohammadian, J. A. Infante Sedano, and Alexander Kurganov. "Three-dimensional shallow water system: A relaxation approach." Journal of Computational Physics, 333 (2017): 160-179.

[10] X. Liu, A. Mohammadian, J. A. Infante Sedano. "Numerical modeling of mixing downstream of a mass slug injection using exponential Runge-Kutta integrator." International Symposium on Outfall Systems, (2016), Ottawa, Canada.

[09] X. Liu, A. Mohammadian, J. A. Infante Sedano. "Three-dimensional modeling of non-hydrostatic free-surface flows on unstructured grids." International Journal for Numerical Methods in Fluids, 82, no.3 (2016):130-147.

[08] X. Liu, A. Mohammadian, A. Kurganov, J. A. Infante Sedano. "Well-balanced central-upwind scheme for a fully coupled shallow water system modeling flows over erodible bed." Journal of Computational Physics, 300 (2015): 202-218.

[07] X. Liu, J. A. Infante Sedano, A. Mohammadian."A coupled two-dimensional numerical model for rapidly varying flow, sediment transport and bed morphology." Journal of Hydraulic Research, 53, no. 5 (2015): 609-621.

[06] X. Liu, J. A. Infante Sedano, A. Mohammadian. "A robust coupled 2-D model for rapidly varying flows over erodible bed using central-upwind method with wetting and drying." Canadian Journal of Civil Engineering, 42, no.8 (2015): 530-543.

[05] X. Liu, A. Mohammadian, J. A. Infante Sedano. "A Well-Balanced 2-D Model for Dam-Break Flow with Wetting and Drying." Journal of Fluid Flow, Heat and Mass Transfer, 1(2014): 30-37.

[04] X. Liu, A. Mohammadian, J. A. Infante Sedano. "One Dimensional Numerical Simulation of Bed Changes in Irrigation Channels using Finite Volume Method." Irrigation & Drainage Systems Engineering, 1, no.103 (2012): 2.

[03] W. Chen, X. Liu, X. Fan, L. Chu, Y. Yang, W. Liu. "Three-dimensional simulation of gas-solid flow in the biomass circulating fluidized bed gasifier's riser." Advanced Materials Research, 383-390 (2012): 6537-6542.

[02] X. Liu, W. Chen, X. Fan, J. Sun, S. Pang. "Various Circulating Fluidized Beds Biomass Gasifers." Boiler Technology, 43, no.1 (2012): 33-37.

[01] X. Liu, W. Chen, X. Fan, J. Sun. "3-D Numerical Simulation of Flow Structure in Miniature Biomass Circulating Fluidized Beds Gasi er." Transactions of the Chinese Society of Agricultural Machinery, 42, no.6 (2011): 112-116.