Error Message—No material has an emissivity greater than 0
The following error message appears as a radiation analysis is started:
Error: None of the materials have an emissivity > 0
The emissivity on at least one material must be greater than 0. Otherwise, all surfaces have an emissivity of 0, meaning that they are completely reflective (and unable to absorb and emit any radiant energy).
Assigning a non-zero value of emissivity to a fluid material causes the value to be applied to the wall surfaces of that part. Emissivity values assigned to solids are applied to the surfaces of the solid, and will "win" over the value assigned to the surrounding fluid material.
To resolve this issue, modify one or more materials to have a non-zero value of emissivity. (Note that emissivity cannot be greater than 1.0.)
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.