Study on the Lyapunov exponents spectrum of pressure fluctuation in gas-solid fluidized bed

Chaotic Lyapunov exponents spectrum was used to analyzed the dynamic behavior of gas-solid fluidized bed with 0.09 m in diameter and 1 m in height. A software was exploited for computing spectrum of Lyapunov exponents in chaotic dynamic system. The dynamic behavior of pressure fluctuation in gas-solid fluidized bed was analyzed by this software. The research shows that dynamic behavior at different gas velocity can be embodied very well from spectrum of Lyapunov exponents. It is confirmed that in gas-solid fluidized bed system the relationship between correlation dimension and spectrum of Lyapunov exponents meets Kaplan-Yorke conjecture. It was verified too that the dynamic character of gas-solid fluidized bed was of dissipative structure.