作者
Emil Hedevang, Jürgen Schmiegel
发表日期
2013/11/1
期刊
Journal of Turbulence
卷号
14
期号
11
页码范围
1-26
出版商
Taylor & Francis
简介
We discuss continuous cascade models and their potential for modelling the energy dissipation in a turbulent flow. Continuous cascade processes, expressed in terms of stochastic integrals with respect to Lévy bases, are examples of ambit processes. These models are known to reproduce experimentally observed properties of turbulence: the scaling and self-scaling of the correlators of the energy dissipation and of the moments of the coarse-grained energy dissipation. We compare three models: a normal model, a normal inverse Gaussian model, and a stable model. We show that the normal inverse Gaussian model is superior to both, the normal and the stable models, in terms of reproducing the distribution of the energy dissipation; and that the normal inverse Gaussian model is superior to the normal model and competitive with the stable model in terms of reproducing the self-scaling exponents. Furthermore …
学术搜索中的文章
E Hedevang, J Schmiegel - Journal of Turbulence, 2013