6533b82efe1ef96bd1293e7e
RESEARCH PRODUCT
Effect of a columnar defect on the shape of slow-combustion fronts
Jussi TimonenJ. MaunukselaMeesoon HaViktor HorváthJuha MerikoskiMarkko MyllysM. Den Nijssubject
Nonlinear systemCondensed matter physicsCondensed Matter (cond-mat)Flow (psychology)Evolution equationFront (oceanography)FOS: Physical sciencesCondensed MatterCombustionNonlinear Sciences::Pattern Formation and SolitonsMathematicsdescription
We report experimental results for the behavior of slow-combustion fronts in the presence of a columnar defect with excess or reduced driving, and compare them with those of mean-field theory. We also compare them with simulation results for an analogous problem of driven flow of particles with hard-core repulsion (ASEP) and a single defect bond with a different hopping probability. The difference in the shape of the front profiles for excess vs. reduced driving in the defect, clearly demonstrates the existence of a KPZ-type of nonlinear term in the effective evolution equation for the slow-combustion fronts. We also find that slow-combustion fronts display a faceted form for large enough excess driving, and that there is a corresponding increase then in the average front speed. This increase in the average front speed disappears at a non-zero excess driving in agreement with the simulated behavior of the ASEP model.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2003-07-10 | Physical Review E |