Analysis of the Self-similar Solutions of a Generalized Burgers Equation with Nonlinear Damping

Analysis of the Self-similar Solutions of a Generalized Burgers Equation with Nonlinear Damping

2001 | CH. SRINIVASA RAO, P. L. SACHDEVA,*, and MYTHILY RAMASWAMY
This paper analyzes the self-similar solutions of a generalized Burgers equation with nonlinear damping. The equation is reduced to a nonlinear ordinary differential equation (ODE) using a similarity transformation. The study focuses on the behavior of solutions under different parameter ranges, particularly the existence and decay properties of positive solutions. The ODE is analyzed for various values of parameters α, λ, and ν, leading to the classification of solutions based on their decay rates (algebraic or exponential) and whether they have finite zeros. The paper presents several theorems that describe the behavior of solutions under different conditions. For example, when α > 3 and λ = 0, there exists a critical value ν* such that solutions decay algebraically to zero for ν < ν*, exponentially for ν = ν*, and have a finite zero for ν > ν*. For α = 3 and λ = 0, solutions decay algebraically to zero and have a finite zero. For 1 < α < 3 and λ = 0, solutions either decay algebraically or have finite zeros depending on ν. The study also considers the effects of λ > 0 and λ < 0 on the solutions. For λ > 0, solutions can decay algebraically or exponentially depending on the parameter values. For λ < 0, solutions may have finite zeros or decay algebraically. The paper also discusses the existence of unbounded solutions and the asymptotic behavior of solutions as η approaches ±∞. Numerical studies are conducted to verify the analytical results, showing the rich structure of solutions for different parameter values. The analysis reveals that the solutions exhibit a variety of behaviors, including algebraic and exponential decay, and the presence of finite zeros, depending on the initial conditions and parameter values. The study contributes to the understanding of the generalized Burgers equation with nonlinear damping and provides insights into the behavior of self-similar solutions.This paper analyzes the self-similar solutions of a generalized Burgers equation with nonlinear damping. The equation is reduced to a nonlinear ordinary differential equation (ODE) using a similarity transformation. The study focuses on the behavior of solutions under different parameter ranges, particularly the existence and decay properties of positive solutions. The ODE is analyzed for various values of parameters α, λ, and ν, leading to the classification of solutions based on their decay rates (algebraic or exponential) and whether they have finite zeros. The paper presents several theorems that describe the behavior of solutions under different conditions. For example, when α > 3 and λ = 0, there exists a critical value ν* such that solutions decay algebraically to zero for ν < ν*, exponentially for ν = ν*, and have a finite zero for ν > ν*. For α = 3 and λ = 0, solutions decay algebraically to zero and have a finite zero. For 1 < α < 3 and λ = 0, solutions either decay algebraically or have finite zeros depending on ν. The study also considers the effects of λ > 0 and λ < 0 on the solutions. For λ > 0, solutions can decay algebraically or exponentially depending on the parameter values. For λ < 0, solutions may have finite zeros or decay algebraically. The paper also discusses the existence of unbounded solutions and the asymptotic behavior of solutions as η approaches ±∞. Numerical studies are conducted to verify the analytical results, showing the rich structure of solutions for different parameter values. The analysis reveals that the solutions exhibit a variety of behaviors, including algebraic and exponential decay, and the presence of finite zeros, depending on the initial conditions and parameter values. The study contributes to the understanding of the generalized Burgers equation with nonlinear damping and provides insights into the behavior of self-similar solutions.
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