Introduction of background knowledge regarding flow physics and CFD as well as detailed information about the use of AcuSolve and what specific options do.
Collection of AcuSolve simulation cases for which results are compared against analytical or experimental results to demonstrate the accuracy
of AcuSolve results.
Mesh attributes control various aspects of the mesh generation process, including mesh size. Mesh attributes can be
set on a global (whole model) and/or local (model entity) basis.
Mesh size can also be specified as a function of location. Geometric shapes such as spheres,
boxes and cylinders can be drawn and mesh sizes are specified for the volume enclosing these
Zone Mesh Attributes.
The Global Mesh Attributes represent mesh settings that are applied to the entire model. Additionally, the
size specified in this panel is used as the global mesh length scale that is used in the octree method when
evaluating all subsequent mesh sizes.
Every geometric model in AcuConsole contains one or more volume groups. The pipe example model has one volume group called fluid with one geometric
region.
Once the geometry is imported into AcuConsole, it will have one or more surface groups. Each of the surface groups could have one or more geometric faces
associated with it.
The boundary layer flag turned on in the Edge Mesh Attributes enables the growing of boundary layer elements on the
surface outward from the edge. It is important to note that the boundary layer is not in the volume, but on the surface.
An edge mesh specifies mesh attributes along a selected edge of a model.
Example of Absolute Mesh Size along an Edge
An absolute mesh size type assigns a maximum element size along the selected edge.
Below is an example using an airfoil where an absolute mesh size of 0.001 is
assigned to the leading edge of the airfoil. The model in this example is of a
simple airfoil shown below.
The airfoil has a chord length of 0.3 meters and a span of 0.45 meters. The edges of
interest need to be identified before mesh size specifications can be assigned to
them. By default, unless otherwise specified, all edges in the model will be grouped
as default upon loading of the geometry in AcuConsole.
To identify the edge, right-click on Edges and select
New. Create as many new groups as there are edges which
will be assigned mesh properties. Rename the edge groups, if desired.
For this example, there are two edge groups specified, the leading edge is one group
and the trailing edge is the second group. All other edges are left in the default
group as they will not be used for meshing purposes.
The absolute mesh size along the leading edge is defined by right-clicking on the
edge group, or double clicking on the name. This will bring up a panel where the
mesh requirements are specified.
The Edge Mesh Attribute panel is much like the panels for surface and volume mesh
size. The mesh size type is defined by either Absolute, Relative, Absolute
Expression, Relative Expression, Absolute Anisotropic or Relative Anisotropic. This
example uses Absolute as the mesh size type to specify the mesh along the leading
edge.
The mesh resulting from the edge specifications listed above is shown below. Notice
the leading edge of the airfoil has a tight cluster of elements along it.
The other mesh size specifications work the same way the surface mesh size
specifications do.
Edge Mesh Boundary Layer Example
The boundary layer flag turned on in the Edge Mesh Attributes enables the growing of boundary layer elements on the surface outward from the edge. It is important to note that the boundary layer is not in the volume, but on the surface.