TITLE:
Influence of the Domain Boundary on the Speeds of Traveling Waves
AUTHORS:
Lanxiang Ma, Jiale Tan
KEYWORDS:
Curvature Flow Equation, Traveling Wave, Average Speed, Spatial Heterogeneity
JOURNAL NAME:
Applied Mathematics,
Vol.5 No.13,
July
22,
2014
ABSTRACT: Let H > 0 be a constant, g ≥ 0 be a periodic function and Ω ={(x, y) |｜x｜ H + g (y), y ∈R}. We consider a curvature flow equation V = κ + A in Ω, where for a simple curve γt Ω, V denotes its normal velocity, κ denotes its curvature and A > 0 is a constant. [1] proved that this equation has a periodic traveling wave U, and that the average speed c of U is increasing in A and H, decreasing in max g' when the scale of g is sufficiently small. In this paper we study the dependence of c on A, H, max g' and on the period of g when the scale of g is large. We show that similar results as [1] hold in certain weak sense.