Alexander Wagner
Assistant Professor
Graduate Coordinator
Ph.D., Theoretical Physics, Oxford University, 1997
M.S., Physics, University of Bielefeld, 1994
Vordiplom, Physics and Mathematics, University
of Bielefeld, 1990
Department of Physics
South Engineering 210
North Dakota State University
Fargo, ND 58105
Tel: (701) 231-9582 or 231-8974
Fax: (701) 231-7088
alexander.wagner [at] ndsu [dot] edu
DSFD
Since fall of 2008 I am the chair of the scientific organizing committee for the annual International Conference on Discrete Simulation of Fluid Dynamics . The first meeting of this conference was in 1987 and this conference has seen the birth of several new important computational methods. The most notable of these are lattice Gases, lattice Boltzmann, Dissipative Particle Dynamics, and Stochastic Rotation Dynamics. At this conference you will find announcements of new developments in these methods and their application to a variety of fields including Soft Matter Physics, Chemical Engineering, Biological Application, and Engineering Fluid Dynamics.
Teaching
Fall 2008: Quantum Physics, PHYS 771
Spring 2009: Statistical Mechanics PHYS 462/662
Research Interest
Lattice Boltzmann
Spinodal
Decomposition
Viscoelasticity
Drop Deformation and
Break-up in a Shear Flow
Wetting
(with Andrew Briant)
Non-equilibrium Thermodynamics
Complex systems
Open Source Software
You can find several research codes in this section. They are currently mostly aimed at Students and collaborators. Other people may find the documentation somewhat scarce, but you are still welcome to download the codes.
Graphical User Interface for scientific application
I (together with Johannes Schlosser) have been developing a GUI for scientists. This library is available as open source software under the GNU public license. It is a C-library that requires the X-windows libraries, i.e. it is useful for people writing C programs under UNIX (or Linux). You can find a description of and download information for the library at http://physics.ndsu.edu/people/faculty/wagner/graphics_library/.
Example Lattice Boltzmann Codes
If you have any suggestions for improvements in these codes (because you found a bug, you know how to improve the performance or because you have some suggestion on making them more readable) please send me an e-mail with your suggestions.
Publications
Theses
Physik Diplom (Bielefeld): Chaos in far
intrinsic semiconductors (August 1994).
D. Phil. in Theoretical Physics (Christ Church, Oxford): Theory and application
of the lattice Boltzmann method (December 1997).
Journal Publications
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A.J. Wagner, "Derivation of a non-objective Oldroyd model from the Boltzmann equation'', cond-mat/0105067 |
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E. Foard and A.J. Wagner, "Enslaved Phase-Separation Fronts in One-Dimensional Binary Mixtures", arXiv/0805.3745 |
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29.
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A.J. Wagner and C.M. Pooley, "Interface width and bulk stability: Requirements for the simulation of deeply quenched liquid-gas systems", Phys. Rev. E 76, 045702(R) (2007), arXiv/0706.1386. |
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28. |
Qun Li and A.J. Wagner, "A Symmetric Free Energy Based Multi-Component Lattice Boltzmann Method", Phys. Rev. E 76, 036701 (2007), arXiv:0704.3444. |
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27. |
A.J. Wagner, S. May, "Electrostatic interactions across a charged lipid bilayer", European Biophysical Journal 36, 293 (2007), cond-mat/0607733. |
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26. |
A.J. Wagner, "Thermodynamic consistency of liquid-gas lattice Boltzmann simulations", Phys. Rev. E 74, 056703 (2006), cond-mat/0607087. |
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25. |
A.J. Wagner and Q. Li, "Investigation of Galilean Invariance of multi-phase lattice Boltzmann methods", Physica A 362, 105 (2006). cond-mat/0410555. |
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24. |
M.E. Cates, J.-C. Desplat, P. Stansell, A.J. Wagner, K. Stratford, R. Adhikari, I. Pagonobarraga, "Physical and computational scaling issues in lattice Boltzmann simulations of binary fluid mixtures", Phil. Trans.: Math., Phys. and Eng. Sci. A 363, 1917 (2005), cond-mat/0411490. |
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23. |
R. Adhikari, M. E. Cates, K. Stratford, A. Wagner, ``Fluctuating lattice Boltzmann'', Europhys. Lett. 71, 473 (2005). cond-mat/0402598. |
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22. |
A. Akthakul, A.J. Wagner, C.E. Scott and A.M. Mayes, "Lattice Boltzmann Simulation of Asymmetric Membrane Formation by Immersion Precipitation", Journal of Membrane Science 249, 213 (2005). |
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21. |
M.E. Cates, K. Stratford, R. Adhikari, P. Stansell, J-C. Desplat, I. Pagonabarraga and A.J. Wagner, "Simulating colloid hydrodynamics with lattice Boltzmann methods", J. Phys.: Condens. Matter 16 S3903 (2004). [also cond-mat/0404643. |
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20. |
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19. |
A.J. Wagner, "Simulations of a rising drop in a non-linear viscoelastic fluid", , Progress in Computational Fluid Dynamics 5, 20 (2005). |
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18. |
A.J. Wagner, L.M. Wilson and M.E. Cates, "Role of inertia in two-dimensional deformation and breakup of a droplet", Phys. Rev. E 68, 045301(R) (2003).[also cond-mat/0212540] |
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17. |
M. E. Cates, J. Vollmer, A. Wagner and D. Vollmer, "Phase Separation in Binary Fluid Mixtures with Continuously Ramped Temperature", Phil. Trans. Roy. Soc. (Lond.) Ser. A, 361 793 (2003).[also cond-mat/0304085 ] |
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16. |
A.J. Wagner, "The origin of spurious velocities in lattice Boltzmann", Int. J. Mod. Phys. B 17 193 (2003).[also cond-mat/0207558] |
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15. |
D. Vollmer, J. Vollmer and A.J. Wagner, "Oscillatory kinetics of phase separation in a binary mixture induced by constant heating'', Phys.Chem. Chem. Phys. 4, 1380 (2002). |
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14. |
A.J. Wagner, "Non-uniqueness of late-time scaling states in spinodal decomposition'', InterJournal Complex Systems Manuscript Number: [404], [also cond-mat/0005511]. |
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13. |
A.J. Wagner and Ignacio Pagonabarraga, "Lees-Edwards boundary conditions for lattice Boltzmann", J. Stat. Phys. 107, 521 (2002), [also cond-mat/0103218]. |
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12. |
Ignacio Pagonabarraga, A.J. Wagner and M.E. Cates, "Binary fluid demixing: The crossover region", J. Stat. Phys. 107, 39 (2002), [also cond-mat/0103269]. |
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11. |
A.J. Wagner and M. E. Cates, "Phase ordering of two-dimensional symmetric binary fluids: a droplet scaling state", Europhys. Lett. 56, 556 (2001), [also cond-mat/0101140]. |
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10. |
B.M. Boghosian, J. Yepez, P.V. Coveney and A.J. Wagner, "Entropic lattice Boltzmann methods", Proc. of the Royal Soc. London A Mat., 457, 717 (2001) [also cond-mat/0005260.] |
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9. |
J.-C. Desplat, A.J. Wagner, and M.E. Cates, "Interfacial dynamics in 3D binary fluid demixing: Animation studies'', I. Pagonabarraga, New Journal of Physics 3 9, (2001). |
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8. |
J.M. Yeomans and A.J. Wagner, "Lattice Boltzmann simulations of complex fluids'', IMA Journal of Mathematics Applied in Business and Industry, 11, 257 (2000). |
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7. |
A.J. Wagner, L. Giraud, and C.E. Scott, "Simulation of a cusped bubble rising in a viscoelastic fluid with a new numerical method'', Comp. Phys. Comm. 129 227 (2000) [also cond-mat/9904029]. |
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6. |
A.J. Wagner and J.M. Yeomans, "Spinodal decomposition of binary mixtures under shear'', Phys. Rev. E 59, 4366 (1999) [also cond-mat/9904033]. |
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5. |
A.J. Wagner and J.M. Yeomans, ``Spinodal decomposition in two-dimensional binary fluids'', Int. Jour. Mod. Phys. C. 9, 1373 (1998). |
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4. |
A.J. Wagner, "An H-Theorem for Lattice Boltzmann'', Europhys. Lett. 44, 144 (1998) [also cond-mat/9808052]. |
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3. |
A.J. Wagner and J.M. Yeomans, "Breakdown of scale invariance in the coarsening of phase-separating binary fluids'', Phys. Rev. Lett. 80, 1429 (1998) [also cond-mat/9710039]. |
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2. |
A.J. Wagner and J.M. Yeomans, "Effect of shear on droplets in a binary mixture'', Int. Jour. Mod. Phys. C. 8, 773 (1997) [also cond-mat/970813]. |
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1. |
A.J. Wagner, "Chaos in Semiconductors induced by a magnetic field'', Proceedings of the International Conference on Dynamical Systems and Chaos, Vol.2, p. 246, Singapore World Scientific (1995). |