A novel multigrid technique for lagrangian modeling of fuel mixing in fluidized beds
Artikel i vetenskaplig tidskrift, 2011

This paper presents a novel Lagrangian approach to model fuel mixing in gas-solid fluidized beds. In the mixing process, fuel particles are considerably larger than the inert bed material and therefore, the present work proposes three grids to account for the difference in size between the fuel particles and inert solids. The information between the grids is exchanged using an algorithm presented in the paper. A statistical method has been developed to analyse the distribution of the fuel particles in the bed. The results for the preferential positions, velocity vectors and horizontal dispersion coefficients are compared with experimental data in a bed applying simplified scaling relationships for different operating conditions. The effects of initial bed height and inlet gas velocity on the fuel mixing are investigated. It is found that the proposed Lagrangian modeling can capture the complex pattern of the movement of the fuel particles, in spite of the large difference in diameter between inert and fuel particles.

Fluidization

Dispersion

Mixing

Multigrid

Lagrangian simulations

Fuel

Författare

Meisam Farzaneh

Chalmers, Tillämpad mekanik, Strömningslära

Srdjan Sasic

Chalmers, Tillämpad mekanik, Strömningslära

Alf-Erik Almstedt

Chalmers, Tillämpad mekanik, Strömningslära

Filip Johnsson

Chalmers, Energi och miljö, Energiteknik

David Pallarès

Chalmers, Energi och miljö, Energiteknik

Chemical Engineering Sciences

0009-2509 (ISSN)

Vol. 66 5628-5637

Ämneskategorier

Beräkningsmatematik

Annan kemiteknik

Strömningsmekanik och akustik

Styrkeområden

Energi

DOI

10.1016/j.ces.2011.07.060