Velocity boundary condition values “leak” across the edge of an Inlet Splitter
Issue
An inlet is split into two surfaces by an edge belonging to a Surface Part acting as a flow splitter oriented normal to the inlet. Different velocity values are applied to the two surfaces that share the common edge. During the simulation, the specified velocity values on one of the inlet surfaces appear to “lead” across the dividing edge so that the wrong value appears on certain nodes in the other surface.
Solution
This occurs because of an ambiguity on the common edge between the two surfaces. Because only one of the specified velocity values can be mapped to the nodes on the edge, the incorrect value occurs in one of the surfaces when the Boundary Layer elements are created during mesh generation.
Instead of a velocity boundary condition, apply a mass flow rate or volume flow rate boundary condition to the two surfaces. This eliminates the ambiguity at the common edge.
AUTODESK DOES NOT GUARANTEE THAT YOU WILL BE ABLE TO SUCCESSFULLY DOWNLOAD OR IMPLEMENT ANY SERVICE PACK OR WORKAROUND, OR ANY OF THE TIPS, TRICKS, EXAMPLES OR SUGGESTIONS OUTLINED IN ANY AUTODESK PRODUCT SUPPORT TECHNICAL DOCUMENTS. TECHNICAL DOCUMENTS, SERVICE PACKS AND WORKAROUNDS ARE SUBJECT TO CHANGE WITHOUT NOTICE TO YOU. AUTODESK PROVIDES TECHNICAL DOCUMENTS, SERVICE PACKS AND WORKAROUNDS "AS IS" WITHOUT WARRANTY OF ANY KIND, WHETHER EXPRESS OR IMPLIED, INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL AUTODESK OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF DATA, OR LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, THAT MAY OCCUR AS A RESULT OF IMPLEMENTING ANY SERVICE PACK OR WORKAROUND, OR ANY SUGGESTION OUTLINED IN ANY AUTODESK PRODUCT SUPPORT TECHNICAL DOCUMENT, EVEN IF AUTODESK OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
