Lattice Boltzmann simulations of cholesteric liquid crystals: Permeative flows, doubly twisted textures and cubic blue phases
We present a lattice Boltzmann algorithm to solve the Beris-Edwards equations of motion for a cholesteric liquid crystal. We use our algorithm to investigate permeative flow. We find that, for helices pinned at the boundary, a small body force leads to a huge viscosity increase whereas larger ones i...
| Main Authors: | , , , |
|---|---|
| Format: | Conference item |
| Published: |
2005
|
| _version_ | 1826266627739484160 |
|---|---|
| author | Marenduzzo, D Dupuis, A Yeomans, J Orlandini, E |
| author_facet | Marenduzzo, D Dupuis, A Yeomans, J Orlandini, E |
| author_sort | Marenduzzo, D |
| collection | OXFORD |
| description | We present a lattice Boltzmann algorithm to solve the Beris-Edwards equations of motion for a cholesteric liquid crystal. We use our algorithm to investigate permeative flow. We find that, for helices pinned at the boundary, a small body force leads to a huge viscosity increase whereas larger ones induce no increase. This shear thinning is in agreement with experiments. If instead, the helix lies perpendicular to the plates, there is almost no viscosity increase. For strong forcing, we identify a flow-induced double twist in the director field. We compare this texture with the static double twist of cubic blue phases. |
| first_indexed | 2024-03-06T20:41:49Z |
| format | Conference item |
| id | oxford-uuid:348ca364-5404-4e8b-a073-dfc8ccb0bd60 |
| institution | University of Oxford |
| last_indexed | 2024-03-06T20:41:49Z |
| publishDate | 2005 |
| record_format | dspace |
| spelling | oxford-uuid:348ca364-5404-4e8b-a073-dfc8ccb0bd602022-03-26T13:26:37ZLattice Boltzmann simulations of cholesteric liquid crystals: Permeative flows, doubly twisted textures and cubic blue phasesConference itemhttp://purl.org/coar/resource_type/c_5794uuid:348ca364-5404-4e8b-a073-dfc8ccb0bd60Symplectic Elements at Oxford2005Marenduzzo, DDupuis, AYeomans, JOrlandini, EWe present a lattice Boltzmann algorithm to solve the Beris-Edwards equations of motion for a cholesteric liquid crystal. We use our algorithm to investigate permeative flow. We find that, for helices pinned at the boundary, a small body force leads to a huge viscosity increase whereas larger ones induce no increase. This shear thinning is in agreement with experiments. If instead, the helix lies perpendicular to the plates, there is almost no viscosity increase. For strong forcing, we identify a flow-induced double twist in the director field. We compare this texture with the static double twist of cubic blue phases. |
| spellingShingle | Marenduzzo, D Dupuis, A Yeomans, J Orlandini, E Lattice Boltzmann simulations of cholesteric liquid crystals: Permeative flows, doubly twisted textures and cubic blue phases |
| title | Lattice Boltzmann simulations of cholesteric liquid crystals: Permeative flows, doubly twisted textures and cubic blue phases |
| title_full | Lattice Boltzmann simulations of cholesteric liquid crystals: Permeative flows, doubly twisted textures and cubic blue phases |
| title_fullStr | Lattice Boltzmann simulations of cholesteric liquid crystals: Permeative flows, doubly twisted textures and cubic blue phases |
| title_full_unstemmed | Lattice Boltzmann simulations of cholesteric liquid crystals: Permeative flows, doubly twisted textures and cubic blue phases |
| title_short | Lattice Boltzmann simulations of cholesteric liquid crystals: Permeative flows, doubly twisted textures and cubic blue phases |
| title_sort | lattice boltzmann simulations of cholesteric liquid crystals permeative flows doubly twisted textures and cubic blue phases |
| work_keys_str_mv | AT marenduzzod latticeboltzmannsimulationsofcholestericliquidcrystalspermeativeflowsdoublytwistedtexturesandcubicbluephases AT dupuisa latticeboltzmannsimulationsofcholestericliquidcrystalspermeativeflowsdoublytwistedtexturesandcubicbluephases AT yeomansj latticeboltzmannsimulationsofcholestericliquidcrystalspermeativeflowsdoublytwistedtexturesandcubicbluephases AT orlandinie latticeboltzmannsimulationsofcholestericliquidcrystalspermeativeflowsdoublytwistedtexturesandcubicbluephases |