{"id":289156,"date":"2023-06-16T13:28:56","date_gmt":"2023-06-16T13:28:56","guid":{"rendered":"\/forum\/forums\/topic\/re-emissivity-values-fluent-combustion-radiation\/"},"modified":"2023-06-16T13:30:40","modified_gmt":"2023-06-16T13:30:40","slug":"re-emissivity-values-fluent-combustion-radiation","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/re-emissivity-values-fluent-combustion-radiation\/","title":{"rendered":"RE: Emissivity values (Fluent – Combustion, Radiation)"},"content":{"rendered":"
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Hi all,<\/p>\n

We are seeking advice choosing an appropriate assumption for refractory wall and water cooled tube wall emissivities in a high temperature furnace.<\/p><\/div>\n<\/div>\n

 <\/div>\n
The furnace 0.9 x 0.9 x 3.5m.The furnace walls are made of light density, vacuum formed, alumina fibre. Furnace is natural gas and hydrogen fire, and it is fitted with stainless steel water cooled tubes<\/div>\n
The focus of the work is predicting radiative heat transfer to the water cooled tubes. These are positioned 50mm inboard of the side walls. There are 5 tubes along each side wall ~0.6m apart.<\/div>\n
Refractory wall temperatures are likely to be in the region of 1200-1400degC and water cooled tube surface temperatures ~100degC.<\/p>\n

Could you advise me on this please? <\/p>\n

Thanks
Jee <\/div>\n","protected":false},"template":"","class_list":["post-289156","topic","type-topic","status-closed","hentry","topic-tag-cfd-combustion","topic-tag-fluent","topic-tag-radiation","topic-tag-species-transport"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t