Particle formation of hydroxyapatite precursor containing two components in a spray pyrolysis process W. Widiyastuti 1 ;Adhi Setiawan 2 ;Sugeng Winardi 1 ;Tantular Nurtono 1 ;Heru Setyawan 1 ; 1. Department of Chemical Engineering, Institut Teknologi Sepuluh Nopember, Kampus ITS Sukolilo, Surabaya 60111, Indonesia ; 2. Politeknik Perkapalan Negeri Surabaya, Kampus ITS Sukolilo, Surabaya 60111, Indonesia ; Fig.3 a Temperature distribution, and validation, as predicted by CFD along the axial direction at the center of the furnace with a carrier gas-flow rate of 1 Lmin and a furnace temperature of 473 K; b temperature distribution by CFD along the axial direction at the center of the furnace for different furnace wall temperatures Frontiers of Chemical Science and Engineering,2014,8(1),104-113. Doi:10.1007/s11705-014-1406-1