KNOWN ISSUE: Boundary mass sources can give incorrect answer for heat transfer and additional variables (Class 3 Error)
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SYMPTOM: If boundary mass (Continuity) sources are used together with either (a) volumetric Additional Variables or (b) heat transfer when the MCF/Energy Sink Option is set to 'Specified Mass Fractions and Local Temperature' and the source value is negative, then incorrect answers are obtained. PROBLEM: This is due to the Solver using incorrect variable values in calculating the secondary sources in the additional variable and heat transfer equations. WORKAROUND: If possible, use a subdomain source adjacent to the boundary. FIXED IN: ANSYS CFX Release 13.0. A custom executable for ANSYS CFX Release 12.1 is available on request. |
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