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Dynamics of two disks in a counter-flow using Immersed Boundary-Lattice Boltzmann method
a Physics of Earth and Complex Systems, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Bandung, 40132, Indonesia
[vc_row][vc_column][vc_row_inner][vc_column_inner][vc_separator css=”.vc_custom_1624529070653{padding-top: 30px !important;padding-bottom: 30px !important;}”][/vc_column_inner][/vc_row_inner][vc_row_inner layout=”boxed”][vc_column_inner width=”3/4″ css=”.vc_custom_1624695412187{border-right-width: 1px !important;border-right-color: #dddddd !important;border-right-style: solid !important;border-radius: 1px !important;}”][vc_empty_space][megatron_heading title=”Abstract” size=”size-sm” text_align=”text-left”][vc_column_text]© 2018 Elsevier LtdWe perform a numerical analysis on the influence of counter-flow on the settling dynamics of two identical disks under gravity in a narrow channel. The study is motivated by the treatment of mud-flow in east Java, Indonesia. A Lattice Boltzmann based simulation is used for the fluid flow. In order to include interaction with moving solid, the Lattice-Boltzmann method is coupled with Immersed Boundary method (usually termed as IBLBM) with modified spreading operator. We use a coupling procedure where the immersed boundary forces are computed directly from the macroscopic velocity. Two different initial configurations are considered here. In the first configuration, the two disks are initially leveled and separated horizontally by a distance of 2D where D is the diameter of the disks. We then show the dynamics of the second one where the two disks are initially separated horizontally by a distance of 2D and vertically by a distance of D. Presenting a Poiseuille-like counter-flow in the first configuration only causes the two disks to have settling trajectories closer to the walls, i.e. the left (right) disk settles closer the left (right) wall. In the latter case, there exists an alternating close-encounter. Our results show that increasing the strength of the counter-flow does not mean that a close-encounter takes place earlier, i.e. there is rather a minimum value.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Author keywords” size=”size-sm” text_align=”text-left”][vc_column_text]Counter-flows,Coupling procedure,Fluid solid interaction,IBLBM,Immersed boundary methods,Initial configuration,Lattice Boltzmann method,Macroscopic velocity[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Indexed keywords” size=”size-sm” text_align=”text-left”][vc_column_text]Counter-flow,Fluid-solid interaction,Hydrodynamics,IBLBM[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Funding details” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”DOI” size=”size-sm” text_align=”text-left”][vc_column_text]https://doi.org/10.1016/j.compfluid.2018.11.007[/vc_column_text][/vc_column_inner][vc_column_inner width=”1/4″][vc_column_text]Widget Plumx[/vc_column_text][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row][vc_column][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][/vc_column][/vc_row]