Reply To: Modelling of Photoacoustic effect in fluent

[Rohan Gulavani]

Hello,

What I understood is , you are adding both emmitted power across all wavelength as well as you are adding aborption coefficient as well, this lead to very high heat is absorbed in surface. So, What I suggest is take average of abosrption coefficient across all wavelength while you can sum emitted power across wavelength this will give you closer abosorbed value if not accurate. Whatever absoption coeffcient you used is looks odd. please check the value (Remember its unit is in 1/m). You can use "gray band" in material properties panel instead of constant. this facilitate you to use multiple bands of absorption coefficient. 

To understand how bands are affecting non gray raditions, suggest to refer Fluent Theory guide. So briefly, The behavior in each band is assumed gray and the radiative transfer equation (RTE) is integrated over each wavelength interval