Citation

Hao QY, Hu MB, Cheng XQ, Song WG, Jiang R, Wu QS. Phys. Rev. E Stat. Nonlin. Soft Matter Phys. 2010; 82(2 Pt 2): 026113.

Affiliation

School of Engineering Science, University of Science and Technology of China, Hefei 230026, China and School of Mathematics and Computational Science, Anqing Teachers College, Anqing 246133, China.

Copyright

(Copyright © 2010, American Physical Society, Publisher American Institute of Physics)

DOI

unavailable

PMID

20866882

Abstract

This paper studies unidirectional pedestrian flow in a channel using the lattice gas model with parallel update rule. The conflict (i.e., several pedestrians intend to move to the same site) is solved by introducing probabilities as in floor field models. The fundamental diagram (FD) is investigated and it is found that when the drift strength D≲0.5 , the FD is a concave curve. With the further increase in drift strength, a turning point appears on FD. The empirical findings show that both concave FD and FD with a turning point exist. Thus, the model might be able to reproduce both by tuning drift strength. It is also shown that in the special case D=1 , two congested branches exist in the FD. We have carried out mean-field analysis of the FD and the mean-field results are in approximate agreement with simulations when the drift strength D is small. A comparison with random sequential update rule model is also made.

Language: en