Mechanical Engineer
Multiscale Modeling
Mechanical Engineer
Multiscale Modeling

Biography

Xu earned his doctorate in mechanical engineering at Rensselaer Polytechnic Institute. His PhD research involved the development of large-scale parallel simulation tools for multi-scale (atomistic to continuum) modeling of aluminum alloys. Xu worked at Idaho National Laboratory (INL) from 2007 to 2010. There, he was involved in modeling and simulation for strongly coupled multi-physical subsurface processes, including flow, reactive transport, and geomechanics.

Since joining PNNL in 2010, he has applied his modeling, simulation, and mathematics skills to various environmental- and energy-related projects, including carbon capture, carbon sequestration, and the development of energy storage devices and materials. He is also interested in fluid dynamics and cosmological flow.

Zhijie (Jay) Xu is on Google Scholar.

Research Interest

  • Computational geomechanics, nanomechanics, and fluid mechanics
  • Computational materials and multiscale modeling
  • High-performance computing
  • Computational modeling methods: Finite Element, Finite Difference, Interface Tracking, Meshless Computational Methods, Discrete Element Method (DEM), Smoothed Particle Hydrodynamics (SPH), Coarse-grain Dissipative Particle Dynamics (DPD), Dislocation Dynamics, Molecular Dynamics (MD), Monte Carlo (MC), and Nudged Elastic Band (NEB)

Education

  • PhD in mechanical engineering, Rensselaer Polytechnic Institute, 2007
  • MS in computational mechanics, Rensselaer Polytechnic Institute, 2003

Affiliations and Professional Service

  • Member, Institute of Physics (IOP)
  • Member, American Physical Society (APS)
  • Member, Materials Research Society (MRS)
  • Member, American Geophysical Union (AGU)

Awards and Recognitions

  • Senior Member, Institute of Electrical and Electronics Engineers

Patents

  • Claude Zeller, Bertrand Haas, and Zhijie Xu, "Copy Detection System Using Correlations of Copy Detection Patterns." 2010. Patent Number: 7787152.

Publications

2023

  • Fu Y., J. Bao, C. Zeng, Y. Chen, Z. Xu, S. Kim, and W. Wang. 2023. "A Three-Dimensional Pore-scale Model for Redox Flow Battery Electrode Design Analysis." Journal of Power Sources 556. PNNL-SA-175492. doi:10.1016/j.jpowsour.2022.232329

2022

  • Bartoldson B., R. Wang, Y. Fu, D. Widemann, S. Nguyen, J. Bao, and Z. Xu, et al. 2022. "Latent Space Simulation for Carbon Capture Design Optimization." In Proceedings of the 36th AAAI Conference on Artificial Intelligence, February 22- March 1, 2022, Virtual, Online, 36, 12447-12453. Palo Alto, California:AAAI Press. PNNL-SA-166438. doi:10.1609/aaai.v36i11.21511
  • Feng S., R.K. Singh, Z. Li, Y. Wang, Y. Fu, J. Bao, and Z. Xu, et al. 2022. "Low-Tortuous and Dense Single-Particle-Layer Electrode for High-Energy Lithium-Sulfur Batteries." Energy & Environmental Science 15, no. 9:3842-3853. PNNL-SA-161239. doi:10.1039/D2EE01442D
  • Fu Y., J. Bao, R.K. Singh, R.F. Zheng, C. Anderson-Cook, S. Bhat, and Z. Xu. 2022. "The Influence of Random Packed Column Parameters on the Liquid holdup and Interfacial Area." AIChE Journal 68, no. 8:e17691. PNNL-SA-160943. doi:10.1002/aic.17691
  • Fu Y., W.E. Frazier, K. Choi, L. Li, Z. Xu, V.V. Joshi, and A. Soulami. 2022. "Prediction of Grain Structure after Thermomechanical Processing of U-10Mo Alloy using Sensitivity Analysis and Machine Learning Surrogate Model." Scientific Reports 12. PNNL-SA-170738. doi:10.1038/s41598-022-14731-8
  • Singh R.K., Y. Fu, C. Zeng, D.T. Nguyen, P. Roy, J. Bao, and Z. Xu, et al. 2022. "Hydrodynamics of countercurrent flow in an additive manufactured column with triply periodic minimal surfaces for carbon dioxide capture." Chemical Engineering Journal 450, no. 2:138124. PNNL-SA-171812. doi:10.1016/j.cej.2022.138124
  • Zeng C., S. Kim, Y. Chen, Y. Fu, J. Bao, Z. Xu, and W. Wang. 2022. "Characterization of electrochemical behavior for aqueous organic redox flow batteries." Journal of Electrochemical Society 169, no. 12:Art. No. 120527. PNNL-SA-178207. doi:10.1149/1945-7111/acadad
  • Zeng C., Y. Fu, R.K. Singh, J. Bao, and Z. Xu. 2022. "Differentiation of static and dynamic interfacial area in the structured packed column." Chemical Engineering Science 260. PNNL-SA-165106. doi:10.1016/j.ces.2022.117877

2021

  • Chen Y., J. Bao, Z. Xu, P. Gao, L. Yan, S. Kim, and W. Wang. 2021. "A two-dimensional analytical unit cell model for redox flow battery evaluation and optimization." Journal of Power Sources 506. PNNL-SA-159241. doi:10.1016/j.jpowsour.2021.230192
  • Chen Y., Z. Xu, C. Wang, J. Bao, B.J. Koeppel, L. Yan, and P. Gao, et al. 2021. "Analytical modeling for redox flow battery design." Journal of Power Sources 482. PNNL-SA-150736. doi:10.1016/j.jpowsour.2020.228817
  • Gao P., H. Wu, X. Zhang, H. Jia, J. Kim, M.H. Engelhard, and C. Niu, et al. 2021. "Optimization of Magnesium-Doped Lithium Metal Anode for High Performance Lithium Metal Batteries through Modeling and Experiment." Angewandte Chemie International Edition 60, no. 30:16506-16513. PNNL-SA-155950. doi:10.1002/anie.202103344
  • Wang D., J. Bao, Z. Xu, B.J. Koeppel, O.A. Marina, A. Noring, and M. Zamarripa-Perez, et al. 2021. "Machine Learning Tools Set for Natural Gas Fuel Cell System Design." In 17th International Symposium on Solid Oxide Fuel Cells (SOF-XVII) July 18, 2021 - July 23, 2021 Stockholm, Sweden. ECS Transactions, 103, Paper No. 2283. PNNL-SA-162378. doi:10.1149/10301.2283ecst

2020

  • Frazier W.E., C. Wang, Z. Xu, N.R. Overman, S. Hu, and V.V. Joshi. 2020. "Recrystallization and Grain Growth Simulations for Multiple-pass Rolling and Annealing of U-10Mo." Metallurgical and Materials Transactions A - Physical Metallurgy and Materials Science 51, no. 2:533-544. PNNL-SA-146694. doi:10.1007/s11661-019-05582-6
  • Fu Y., J. Bao, R.K. Singh, C. Wang, and Z. Xu. 2020. "Investigation of Countercurrent Flow Profile and Liquid Holdup in Random Packed Column with Local CFD Data." Chemical Engineering Science 221. PNNL-SA-148356. doi:10.1016/j.ces.2020.115693
  • Singh R.K., J. Bao, C. Wang, Y. Fu, and Z. Xu. 2020. "Hydrodynamics of countercurrent flows in a structured packed column: effects of initial wetting and dynamic contact angle." Chemical Engineering Journal 398. PNNL-SA-149254. doi:10.1016/j.cej.2020.125548
  • Wang C., Z. Xu, and B.J. Koeppel. 2020. "A Discrete Element Model Simulation of Structure and Bonding at Interfaces between Cathode and Contact Paste in Solid Oxide Fuel Cells." Renewable Energy 157. PNNL-SA-141010. doi:10.1016/j.renene.2020.05.111
  • Wang C., Z. Xu, D.K. Fagan, D.P. Field, C.A. Lavender, and V.V. Joshi. 2020. "Quantifying and qualifying alloys based on level of homogenization: A U-10Mo alloy case study." Journal of Engineering Materials and Technology 142, no. 1:Article No. 011012. PNNL-SA-137671. doi:10.1115/1.4044891
  • Zhou Y., M. Su, X. Yu, Y. Zhang, J. Wang, X. Ren, and R. Cao, et al. 2020. "Real-time mass spectrometric characterization of the solid-electrolyte interphase of a lithium-ion battery." Nature Nanotechnology 15, no. 3:224-230. PNNL-SA-144845. doi:10.1038/s41565-019-0618-4

2019

  • Hu W., G. Guo, X. Hu, D. Negrut, Z. Xu, and W. Pan. 2019. "A Consistent Spatially Adaptive Smoothed Particle Hydrodynamics Method for fluid-structure interactions." Computer Methods in Applied Mechanics and Engineering 347. PNNL-SA-137120. doi:10.1016/j.cma.2018.10.049
  • Jia H., L. Zou, P. Gao, X. Cao, W. Zhao, Y. He, and M.H. Engelhard, et al. 2019. "High-performance silicon anodes enabled by nonflammable localized high-concentration electrolytes." Advanced Energy Materials 9, no. 31:Article No. 1900784. PNNL-SA-141600. doi:10.1002/aenm.201900784
  • Su M., Z. Xu, and Y. Wang. 2019. "Poisson-Boltzmann Theory with Non-Linear Ion Correlations." Journal of Physics: Condensed Matter 31, no. 35:Article Number 355101. PNNL-SA-137901. doi:10.1088/1361-648X/ab24a9
  • Wang C., R.K. Singh, and Z. Xu. 2019. "Device-scale Computational Fluid Dynamics Modeling of Carbon Dioxide Absorption Using Encapsulated Sorbents." Powder Technology 344. PNNL-SA-136437. doi:10.1016/j.powtec.2018.12.038
  • Wang C., Z. Xu, C. Lai, and X. Sun. 2019. "A Numerical Study of Two-Phase Flow and Interfacial Mass Transfer in a Wetted Wall Column for Counter-Current Gas Absorption." International Journal of Fluid Mechanics Research 46, no. 5:395-406. PNNL-SA-118683. doi:10.1615/InterJFluidMechRes.2018025640
  • Xu Z., R.K. Singh, J. Bao, and C. Wang. 2019. "Direct Effect of Solvent Viscosity on the Physical Mass Transfer for Wavy Film Flow in a Packed Column." Industrial and Engineering Chemistry Research 58, no. 37:17524-17539. PNNL-SA-139101. doi:10.1021/acs.iecr.9b01226

2018

  • Luo L., M. Su, P. Yan, L. Zou, D.K. Schreiber, D.R. Baer, and Z. Zhu, et al. 2018. "Atomic Origins of Water-Vapour-Promoted Alloy Oxidation." Nature Materials 17, no. 6:514-518. PNNL-SA-124752. doi:10.1038/s41563-018-0078-5
  • Pan W., J. Galvin, W. huang, Z. Xu, X. Sun, Z. fan, and K. Liu. 2018. "Device-scale CFD modeling of gas-liquid multiphase flow and amine absorption for CO2 capture." Greenhouse Gases: Science and Technology 8, no. 3:603-620. PNNL-SA-137121. doi:10.1002/ghg.1770
  • Singh R.K., C. Wang, and Z. Xu. 2018. "Residence time distribution in a structured packing unit for monitoring aerosol emissions." International Journal of Greenhouse Gas Control 79. PNNL-SA-135050. doi:10.1016/j.ijggc.2018.11.001
  • Wang C., Z. Xu, C. Lai, and X. Sun. 2018. "Beyond the Standard Two-Film Theory: Computational Fluid Dynamics Simulations for Carbon Dioxide Capture in a Wetted Wall Column." Chemical Engineering Science 184. PNNL-SA-130465. doi:10.1016/j.ces.2018.03.021
  • Wang C., Z. Xu, C. Lai, G.A. Whyatt, P. Marcy, and X. Sun. 2018. "Hierarchical Calibration and Validation Framework of Bench-scale Computational Fluid Dynamics Simulations for Solvent-based Carbon Capture: Part 2. Chemical Absorption across a Wetted Wall Column." Greenhouse Gases: Science and Technology 8, no. 1:150-160. PNNL-SA-126976. doi:10.1002/ghg.1727
  • Zhang Y., M. Su, X. Yu, Y. Zhou, J. Wang, R. Cao, and W. Xu, et al. 2018. "Investigation of Ion-Solvent Interactions in Nonaqueous Electrolytes Using in Situ Liquid SIMS." Analytical Chemistry 90, no. 5:3341-3348. PNNL-SA-131962. doi:10.1021/acs.analchem.7b04921

2017

  • Devaraj A., V. Murugesan, J. Bao, M.F. Guo, M.A. Derewinski, Z. Xu, and M.J. Gray, et al. 2017. "Nanoscale Compositional Mapping of Spent HZSM-5: An Atom Probe Tomography Study." In Proceedings of the North American Catalysis Society Meeting (NAM25), June 4-9, 2017, Denver, CO. PNNL-SA-122368.
  • Koeppel B.J., C. Lai, A. Iyengar, Z. Xu, C. Wang, and G.A. Hackett. 2017. "Use of a Reduced Order Model (ROM) to Simulate SOFC Performance in System Models." ECS Transactions 78, no. 1:2595-2605. PNNL-SA-125147. doi:10.1149/07801.2595ecst
  • Lai C., Z. Xu, T. Li, A. Lee, J. Dietiker, W. Lane, and X. Sun. 2017. "Effects of Heat Exchanger Tubes on Hydrodynamics and CO2 Capture of a Sorbent-based Fluidized Bed Reactor." Powder Technology 322. PNNL-SA-124598. doi:10.1016/j.powtec.2017.07.062
  • Wang C., Z. Xu, C. Lai, G.A. Whyatt, P. Marcy, and X. Sun. 2017. "Hierarchical Calibration and Validation for Modeling Bench-scale Solvent-based Carbon Capture: Part 1. Non-reactive Physical Mass Transfer across the Wetted Wall Column." Greenhouse Gases: Science and Technology 7, no. 4:706-720. PNNL-SA-122798. doi:10.1002/ghg.1682
  • Xu Z., and A.M. Tartakovsky. 2017. "Method of model reduction and multifidelity models for solute transport in random layered porous media." Physical Review E 96, no. 3:Article No. 033314. PNNL-SA-119187. doi:10.1103/PhysRevE.96.033314
  • Xu Z., C. Lai, P. Marcy, J. Dietiker, T. Li, A. Sarkar, and X. Sun. 2017. "Predicting the Performance Uncertainty of a 1-MW Pilot-scale Carbon Capture System after Hierarchical Laboratory-scale Calibration and Validation." Powder Technology 312. PNNL-SA-116536. doi:10.1016/j.powtec.2017.02.027
  • Xu Z., W. Xu, E.V. Stephens, and B.J. Koeppel. 2017. "Mechanical Reliability and Life Prediction of Coated Metallic Interconnects within Solid Oxide Fuel Cells." Renewable Energy 113. PNNL-SA-120828. doi:10.1016/j.renene.2017.06.103

2016

  • Devaraj A., V. Murugesan, J. Bao, M.F. Guo, M.A. Derewinski, Z. Xu, and M.J. Gray, et al. 2016. "Discerning the Location and Nature of Coke Deposition from Surface to Bulk of Spent Zeolite Catalysts." Scientific Reports 6. PNNL-SA-113562. doi:10.1038/srep37586
  • Hu S.Y., D. Burkes, C.A. Lavender, D.J. Senor, W. Setyawan, and Z. Xu. 2016. "Formation mechanism of gas bubble superlattice in UMo metal fuels: Phase-field modeling investigation." Journal of Nuclear Materials 479. PNNL-SA-112981. doi:10.1016/j.jnucmat.2016.07.012
  • Lai C., Z. Xu, W. Pan, X. Sun, C. Storlie, P. Marcy, and J. Dietiker, et al. 2016. "Hierarchical Calibration and Validation of Computational Fluid Dynamics Models for Solid Sorbent-based Carbon Capture." Powder Technology 288. PNNL-SA-109114. doi:10.1016/j.powtec.2015.11.021
  • Xu Z., R. Tipireddy, and G. Lin. 2016. "Analytical Approximation and Numerical Studies of One-dimensional Eliptic Equation with Random Coefficients." Applied Mathematical Modelling 40, no. 9-10:5542-5559. PNNL-SA-125965. doi:10.1016/j.apm.2015.12.041
  • Xu Z., R. Tipireddy, and G. Lin. 2016. "Analytical Approximation and Numerical Studies of One-dimensional Elliptic Equation with Random Coefficients." Applied Mathematical Modelling 40, no. 9-10:5542-5559. PNNL-SA-101711. doi:10.1016/j.apm.2015.12.041
  • Xu Z., V.V. Joshi, S.Y. Hu, D.M. Paxton, C.A. Lavender, and D. Burkes. 2016. "Modeling the Homogenization Kinetics of As-Cast U-10wt% Mo alloys." Journal of Nuclear Materials 471. PNNL-SA-113656. doi:10.1016/j.jnucmat.2015.11.026

2015

  • Bao J., Z. Xu, and Y. Fang. 2015. "A coupled discrete element and finite element model for multiscale simulation of geological carbon sequestration." Greenhouse Gases: Science and Technology 5, no. 4:474-486. PNNL-SA-96622. doi:10.1002/ghg.1491
  • Bao J., Z. Xu, and Y. Fang. 2015. "Uncertainty Quantification for the Reliability of the Analytical Analysis for the Simplified Model of CO2 Geological Sequestration." Greenhouse Gases: Science and Technology 5, no. 1002:141-151. PNNL-SA-100416. doi:10.1002/ghg.1436
  • Madaan N., J. Bao, M.I. Nandasiri, Z. Xu, S. Thevuthasan, and A. Devaraj. 2015. "Impact of Dynamic Specimen Shape Evolution on the Atom Probe Tomography Results of Doped Epitaxial Oxide Multilayers: Comparison of Experiment and Simulation." Applied Physics Letters 107, no. 9:Article No. 091601. PNNL-SA-109596. doi:10.1063/1.4929705
  • Xu Z., D. Li, D.K. Schreiber, K.M. Rosso, and S.M. Bruemmer. 2015. "Modeling Selective Intergranular Oxidation of Binary Alloys." Journal of Chemical Physics 142, no. 1:Article No. 014704. PNNL-SA-105917. doi:10.1063/1.4905226
  • Xu Z., D. Li, W. Xu, A. Devaraj, R.J. Colby, S. Thevuthasan, and B.P. Geiser, et al. 2015. "Simulation of Heterogeneous Atom Probe Tip Shape Evolution during Field Evaporation Using a Level Set Method and Different Evaporation Models." Computer Physics Communications 189. PNNL-SA-98577. doi:10.1016/j.cpc.2014.12.016
  • Xu Z., D. Li, W. Xu, A. Devaraj, R.J. Colby, S. Thevuthasan, and B.P. Geiser, et al. 2015. "Simulation of Heterogeneous Atom Probe Tip Shapes Evolution during Field Evaporation Using a Level Set Method and Different Evaporation Models." Computer Physics Communications 189. PNNL-SA-102867. doi:10.1016/j.cpc.2014.12.016

2014

  • Bao J., Y. Chu, Z. Xu, A.M. Tartakovsky, and Y. Fang. 2014. "Uncertainty quantification for the impact of injection rate fluctuation on the geomechanical response of geological carbon sequestration." International Journal of Greenhouse Gas Control 20. PNNL-SA-93937. doi:10.1016/j.ijggc.2013.10.023
  • Bao J., Z. Xu, and Y. Fang. 2014. "A Finite-Element Model for Simulation of Carbon Dioxide Sequestration." Environmental Geotechnics 1, no. 3:152-160. PNNL-SA-88505. doi:10.1680/envgeo.13.00024
  • Lin G., J. Bao, and Z. Xu. 2014. "A three-dimensional phase field model coupled with lattice kinetics solver for modeling crystal growth in furnaces with accelerated crucible rotation and traveling magnetic field." Computers & Fluids 103. PNNL-SA-98927. doi:10.1016/j.compfluid.2014.07.027
  • Lin G., J. Bao, Z. Xu, A.M. Tartakovsky, and C.H. Henager. 2014. "A phase-field model coupled with lattice kinetics solver for modeling crystal growth in furnaces." Communications in Computational Physics 15, no. 1:76-92. PNNL-SA-89043. doi:10.4208/cicp.300612.210313a
  • Xu Z., R. Diao, S. Lu, J. Lian, and Y. Zhang. 2014. "Modeling of Electric Water Heaters for Demand Response: A Baseline PDE Model." IEEE Transactions on Smart Grid 5, no. 5:2203-2210. PNNL-SA-95788. doi:10.1109/TSG.2014.2317149

2013

  • Bao J., Z. Xu, and Y. Fang. 2013. "A Finite Element Model for Simulation of Carbon Dioxide Sequestration." Environmental Geotechnics 1, no. 3:152-160. PNNL-SA-97945. doi:10.1680/envgeo.13.00024
  • Bao J., Z. Xu, G. Lin, and Y. Fang. 2013. "Evaluating the impact of aquifer layer properties on geomechanical response during CO2 geological sequestration." Computers & Geosciences 54. PNNL-SA-92354. doi:10.1016/j.cageo.2013.01.015
  • Fang Y., B.N. Nguyen, K.C. Carroll, Z. Xu, S.B. Yabusaki, T.D. Scheibe, and A. Bonneville. 2013. "Development of a coupled thermo-hydro-mechanical model in discontinuous media for carbon sequestration." International Journal of Rock Mechanics and Mining Sciences 62. PNNL-SA-88739. doi:10.1016/j.ijrmms.2013.05.002
  • Li D., Z. Xu, and S. Ahzi. 2013. "Dynamic Composition Determination in Heterogeneous Ensembles using Angular Autocorrelation Functions as Signatures." Applied Physics Letters 102, no. 22:Article No. 223701. PNNL-SA-95443. doi:10.1063/1.4809667
  • Xu Z., and P. Meakin. 2013. "Upscaling of Solute Transport in Heterogeneous Media with Non-uniform Flow and Dispersion Fields." Applied Mathematical Modelling 37, no. 18-19:8533-8542. PNNL-SA-97040. doi:10.1016/j.apm.2013.03.070
  • Xu Z., D. Li, W. Xu, A. Devaraj, R.J. Colby, and S. Thevuthasan. 2013. "A Level Set Evaporation Model for Heterogeneous Atom Probe Tip." In Proceedings of Microscopy & Microanalysis 2013, August 4-8, 2013, Indianapolis, Indiana, 19, 934-935. Cambridge:Cambridge University Press. PNNL-SA-94999. doi:10.1017/S1431927613006661
  • Xu Z., D. Li, W. Xu, A. Devaraj, R.J. Colby, and S. Thevuthasan. 2013. "A Level Set Evaporation Model for Heterogeneous Atom Probe Tip." In Proceedings of Microscopy & Microanalysis 2013, 19, 934-935. Cambridge:Cambridge University Press. PNNL-SA-93961. doi:10.1017/S1431927613006661

2012

  • Xu Z. 2012. "A Reduced-Boundary-Function Method for Convective Heat Transfer with Axial Heat Conduction and Viscous Dissipation." Journal of Heat Transfer 134, no. 7:Article No. 071705. PNNL-SA-83415. doi:10.1115/1.4006112
  • Xu Z. 2012. "Homogenization and Upscaling for Diffusion, Heat Conduction, and Wave Propagation in Heterogeneous Materials." Communications in Theoretical Physics 57, no. 3:348-354. PNNL-SA-85388. doi:10.1088/0253-6102/57/3/04
  • Xu Z., A.M. Tartakovsky, and W. Pan. 2012. "Discrete-element model for the interaction between ocean waves and sea ice." Physical Review E 85, no. 1:Article No. 016703. PNNL-SA-81118. doi:10.1103/PhysRevE.85.016703
  • Xu Z., H. Huang, X. Li, and P. Meakin. 2012. "Phase field and level set methods for modeling solute precipitation and/or dissolution." Computer Physics Communications 183, no. 1:15-19. PNNL-SA-82157. doi:10.1016/j.cpc.2011.08.005
  • Xu Z., K.M. Rosso, and S.M. Bruemmer. 2012. "Metal Oxidation Kinetics and the Transition from Thin to Thick Films." Physical Chemistry Chemical Physics. PCCP 14, no. 42:14534-14539. PNNL-SA-87165. doi:10.1039/C2CP42760E
  • Xu Z., X. Sun, and M.A. Khaleel. 2012. "A Generalized Kinetic Model for Heterogeneous Gas-Solid Reactions." Journal of Chemical Physics 137, no. 7:Article No. 074702. PNNL-SA-88486. doi:10.1063/1.4740242
  • Xu Z., Y. Fang, T.D. Scheibe, and A. Bonneville. 2012. "A fluid pressure and deformation analysis for geological sequestration of carbon dioxide." Computers & Geosciences 46. PNNL-SA-82750.
  • Xu Z., Y. Fang, T.D. Scheibe, and A. Bonneville. 2012. "A Hydro-mechanical Model and Analytical Solutions for Geomechanical Modeling of Carbon Dioxide Geological Sequestration." In Energy Technology 2012: Carbon Dioxide Management and Other Technologies, edited by MD Salazar-Villalpando, et al. Hoboken, New Jersey:John Wiley & Sons, Inc. PNNL-SA-85371.

2011

  • Xu Z., and P. Meakin. 2011. "Phase-field modeling of two-dimensional solute precipitation/dissolution: Solid fingers and diffusion-limited precipitation." Journal of Chemical Physics 134, no. 4:044137. PNNL-SA-75534. doi:10.1063/1.3537973
  • Xu Z., K.M. Rosso, and S.M. Bruemmer. 2011. "A Generalized Mathematical Framework for Thermal Oxidation Kinetics." Journal of Chemical Physics 135, no. 2:Article No. 024108. PNNL-SA-78995. doi:10.1063/1.3607984
  • Xu Z., P. Meakin, A.M. Tartakovsky, and T.D. Scheibe. 2011. "Dissipative-particle-dynamics model of biofilm growth." Physical Review E 83, no. 6:Article No. 066702. PNNL-SA-75521. doi:10.1103/PhysRevE.83.066702

2009

  • Xu Z., P. Meakin, and A.M. Tartakovsky. 2009. "Diffuse-interface model for smoothed particle hydrodynamics." Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics 79, no. 3:Art. No. 036702. PNNL-SA-64528.

2007

  • Meakin P., A.M. Tartakovsky, T.D. Scheibe, D.M. Tartakovsky, G. Redden, P.E. Long, and S.C. Brooks, et al. 2007. "Particle methods for simulation of subsurface multiphase fluid flow and biogeological processes." Journal of Physics: Conference Series 78, no. 1:Article No. 012047. PNNL-SA-55963. doi:10.1088/1742-6596/78/1/012047

Selected Publications

2009

  • Book Chapters: Tartakovsky AM, Z Xu, and P Meaki. 2009. "Lagrangian Particle Models for Biological Systems." In: Porous Media: Applications in Biological Systems and Biotechnology. K Vafai, Editor, CRC Press, Taylor & Francis LLC, Boca Raton, Florida.
  • Xu Z, P Meakin, and A Tartakovsky. 2009. "Diffuse-Interface Model for Smoothed Particle Hydrodynamics." Physical Review E 79(3):036702-1-036702-7. DOI:10.1103/PhysRevE.79.036702.
  • Xu Z and P Meakin. 2009. "A Phase Field Approach to No Slip Boundary Conditions in Dissipative Particle Dynamics and Other Particle Models for Fluid Flow in Geometrically Complex Confined Systems." Journal of Chemical Physics 130(23):234103. DOI:10.1063/1.3152634 Selected in the Virtual Journal of Nanoscale Science & Technology 19(26). Reported in Vertical News - A Top News Source Online (July 28 2009).
  • Meakin P and Z Xu. 2009. "Dissipative Particle Dynamics and Other Particle Methods for Multiphase Fluid Flow in Fractured and Porous Media" Progress in Computational Fluid Dynamics 9(6/7):399-408. DOI:10.1504/PCFD.2009.027371.

2008

  • Xu Z and P Meakin. 2008. "Phase-Field Modeling of Solute Precipitation and Dissolution at Solid-Fluid Interface." Journal of Chemical Physics 129(1):014705.
  • Picu RC, R Li, and Z Xu. 2008. "Strain Rate Sensitivity of Thermally Activated Dislocation Motion Across Fields of Obstacles of Different Kind." Materials Science and Engineering A 502(1-2):164-171.

2007

  • Xu Z and RC Picu. 2007. "Effect of Residual and Pre-Existing Solute Cluster on the Dynamic Strain Aging in Dilute Solid Solutions." Modelling and Simulation in Materials Science and Engineering 15(5):385-396.
  • Xu Z and RC Picu. 2007. "Thermally Activated Motion of Dislocations in a Field of Point Obstacles: Effect of Obstacle Distribution." Physical Review B 76(9):094112. DOI:10.1103/PhysRevB.76.094112.
  • Meakin P, A Tartakovsky, T Scheibe, D Tartakovsky, G Redden, P E Long, S C Brooks, and Z Xu. 2007. "Particle Methods for Simulation of Subsurface Multiphase Fluid Flow and Biogeological Processes." Journal of Physics: Conference Series 78:012047.
  • Picu RC and Z Xu. 2007. "Vacancy Concentration in Al-Mg Solid Solutions." Scripta Materialia 57(1):45-48. DOI: 10.1016/j.scriptamat.2007.03.014.

2006

  • Xu Z, KK Ang, and Q Wang. 2006. "A Study of Interaction Between Embedded SMA Fibers and Host Material." Mechanics of Advanced Materials and Structures 13(1):33-42. DOI: 10.1080/15376490500343758.
  • Xu Z and RC Picu. 2006. "Dislocation-Solute Cluster Interaction in Al-Mg Binary Alloys." Modelling and Simulation in Materials Science and Engineering 14:195-206.
  • Xu Z, LG Zhou, J Wang, T Cale, and H Huang. 2006. "Three-Dimensional Ehrlich-Schwoebel Diffusion Barriers of Tungsten." Computers, Materials & Continua 5:43-48.

2004

Xu Z, RC Picu, and J Fish. 2004. "Higher Order Continuum Wave Equation Calibrated on Lattice Dynamics." International Journal of Computational Engineering Science 5:557-573.