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Seminars

Fall 2016 Seminars

DateTitleAuthor
August 22, 2016
August 29, 2016Developing a fluctuating lattice Boltzman method for the diffusion equationKyle Strand
September 5, 2016<Labour Day>
September 12, 2016
September 19, 2016Analytical and numerical approach to cyclic diffusion Aaron Feickert

September 26, 2016

Lattice Boltzmann with collision operator derived from Molecular DynamicReza Parsa
October 3, 2016TBAAlan Denton
October 10, 2016TBA Guilherme Volpe Bossa
October 17, 2016TBAKent Ridl
October 24, 2016TBADayton Jon Vogel
October 31, 2016
November 7, 2016TBASylvio May
November 14, 2016
November 21, 2016

November 28, 2016

December 5, 2016
December 12, 2016<Exam Week!>

 

 

Lattice Boltzmann with collision operator derived from Molecular Dynamics

Reza Parsa

Graduate Student,
Department of Physics,
North Dakota State University,

 

Monday September 26, 3:00-4:00pm.

221 South Engineering,

We present here a mapping of a molecular dynamics simulation onto density transfers between cells, reminiscent of lattice gas and lattice Boltzmann methods. We show that while it is impossible for fundamental reasons to map this method on a standard lattice gas method, it may be possible to map an ensemble average of this method onto a lattice Boltzmann method.  We performed a sample Molecular Dynamics simulation for the underlying physical dynamics. The migration of particles was observed at each time-step and lattice cell with associate a lattice velocity vector. After another time-step particles were redistributed to new lattice sites and lattice velocities which can be understood as an effective Molecular Dynamics derived Lattice Boltzmann (MDLB) collision operator.  We show that the new MDLB collision operator shows promise for mapping it onto a standard collision operator of lattice Boltzmann.



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