English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

This paper describes the applicability of a multi-level grid type turbulent shallow flow model (KMR: Kinematic Mesh Reconstruction) to an unsteady open channel flow around a bridge pier. The KMR model employed a two-dimensional depth-averaged URANS (Unsteady Reynolds Averaged Navier Stokes) type shallow flow equations. As a turbulence model, a second-order non-linear 0-equation model proposed by Kimura et al (2009) is adopted. The turbulence structure in a shallow open channel flow is characterized by vortex merging and up-cascading. To predict efficiently a large spatial difference of the turbulence scale, computational grid is divided and merged automatically and dynamically at each time step. The model is applied to a shallow flow around a square bridge pier model and the accuracy of computational results on vortices behavior, velocity profile and water surface elevation is examined through the comparison with a previous experimental result. Numerical results showed that the present model could capture excellently the fundamental aspects of the flow around a bridge pier with less CPU time than the fixed grid computation.

APPLICATION OF KMR SHALLOW WATER NUMERICAL MODEL TO UNSTEADY FLOWS AROUND A BRIDGE PIER