Loading docs/source/inputs/InputsProblemDefinition.rst +51 −0 Original line number Diff line number Diff line Loading @@ -675,6 +675,7 @@ The type of the boundary conditions in the BC region must be defined. | | * 'mi' for mass inflow BC type | | | | | * 'nsw' for no-slip wall BC type | | | | | * 'eb' for setting inhomogeneous Dirichlet BCs on the contained EBs | | | | | * 'eb' for setting inflow fluid velocity on the contained EBs. | | | +---------------------+-----------------------------------------------------------------------+-------------+-----------+ For a fluid phase, the following inputs can be defined. Loading Loading @@ -773,3 +774,53 @@ Below is an example for specifying boundary conditions for a fluid `myfluid`. bc.hot-walls = eb bc.hot-walls.eb.temperature = 800 In addition to the temperature, it is possible to set an inflow condition for the fluid velocity on an embedeed boundary face. We recall that, on the remaining part of the EBs, no slip velocity conditions are assumed by default. In the following table there is a list of the possible entries for inflow EB boundary conditions. Each entry must be preceded by `bc.[region0].` +---------------------+-----------------------------------------------------------------------+-------------+-----------+ | | Description | Type | Default | +=====================+=======================================================================+=============+===========+ | fluid.velocity | (Required) Inflow BC for fluid velocity on EBs contained in the | Reals | None | | | in the (tridimensional) region. | | | | | Note that if only one value is specified, that is assumed to | | | | | be the magnitude in the direction of the EB face's normal. | | | +---------------------+-----------------------------------------------------------------------+-------------+-----------+ | fluid.volfrac | (Required) Volume fraction. | Real | None | +---------------------+-----------------------------------------------------------------------+-------------+-----------+ | eb.normal | (Optional) When specified, only cells with EB face normal parrallel | Reals | None | | | and opposite in direction to the specified value are | | | | | imposed with the inflow velocity. | | | +---------------------+-----------------------------------------------------------------------+-------------+-----------+ | eb.normal_tol | (Optional) Used in conjunction with `eb.normal`. It determines the | Real | None | | | tolerance for choosing cells with a specific normal. | | | +---------------------+-----------------------------------------------------------------------+-------------+-----------+ Below is an example for specifying a normal inflow velocity magnitude for a region `eb-flow`. .. code-block:: none bc.regions = eb-flow bc.eb-flow = eb bc.eb-flow.fluid.volfrac = 1.0 bc.eb-flow.fluid.velocity = 0.1 Below is an example where only specific cells are imposed a velocity. .. code-block:: none bc.regions = eb-flow bc.eb-flow = eb bc.eb-flow.eb.normal_tol = 3.0 bc.eb-flow.eb.normal = 0.9848 0.0000 0.1736 # 10 deg bc.eb-flow.fluid.volfrac = 1.0 bc.eb-flow.fluid.velocity = 0.1 0.0 0.0 Loading
docs/source/inputs/InputsProblemDefinition.rst +51 −0 Original line number Diff line number Diff line Loading @@ -675,6 +675,7 @@ The type of the boundary conditions in the BC region must be defined. | | * 'mi' for mass inflow BC type | | | | | * 'nsw' for no-slip wall BC type | | | | | * 'eb' for setting inhomogeneous Dirichlet BCs on the contained EBs | | | | | * 'eb' for setting inflow fluid velocity on the contained EBs. | | | +---------------------+-----------------------------------------------------------------------+-------------+-----------+ For a fluid phase, the following inputs can be defined. Loading Loading @@ -773,3 +774,53 @@ Below is an example for specifying boundary conditions for a fluid `myfluid`. bc.hot-walls = eb bc.hot-walls.eb.temperature = 800 In addition to the temperature, it is possible to set an inflow condition for the fluid velocity on an embedeed boundary face. We recall that, on the remaining part of the EBs, no slip velocity conditions are assumed by default. In the following table there is a list of the possible entries for inflow EB boundary conditions. Each entry must be preceded by `bc.[region0].` +---------------------+-----------------------------------------------------------------------+-------------+-----------+ | | Description | Type | Default | +=====================+=======================================================================+=============+===========+ | fluid.velocity | (Required) Inflow BC for fluid velocity on EBs contained in the | Reals | None | | | in the (tridimensional) region. | | | | | Note that if only one value is specified, that is assumed to | | | | | be the magnitude in the direction of the EB face's normal. | | | +---------------------+-----------------------------------------------------------------------+-------------+-----------+ | fluid.volfrac | (Required) Volume fraction. | Real | None | +---------------------+-----------------------------------------------------------------------+-------------+-----------+ | eb.normal | (Optional) When specified, only cells with EB face normal parrallel | Reals | None | | | and opposite in direction to the specified value are | | | | | imposed with the inflow velocity. | | | +---------------------+-----------------------------------------------------------------------+-------------+-----------+ | eb.normal_tol | (Optional) Used in conjunction with `eb.normal`. It determines the | Real | None | | | tolerance for choosing cells with a specific normal. | | | +---------------------+-----------------------------------------------------------------------+-------------+-----------+ Below is an example for specifying a normal inflow velocity magnitude for a region `eb-flow`. .. code-block:: none bc.regions = eb-flow bc.eb-flow = eb bc.eb-flow.fluid.volfrac = 1.0 bc.eb-flow.fluid.velocity = 0.1 Below is an example where only specific cells are imposed a velocity. .. code-block:: none bc.regions = eb-flow bc.eb-flow = eb bc.eb-flow.eb.normal_tol = 3.0 bc.eb-flow.eb.normal = 0.9848 0.0000 0.1736 # 10 deg bc.eb-flow.fluid.volfrac = 1.0 bc.eb-flow.fluid.velocity = 0.1 0.0 0.0
