A computer model for meandering rivers with multiple bed load sediment sizes: 2. Computer simulations

A model with density currents has been developed and tested to simulate bed load sediment traps. In this model, the bed load layer over the pipe invert is considered as a continuous layer characterised by a density and a viscosity which depends on the solid concentration. A set of equations has been established that describes the trapping of the bed load material as the dynamics of two non-miscible fluids over and in the bed load sediment trap. The Fluent package has been used and adapted to solve the equations of the model. The VOF method (Volume Of Fluid) has been chosen to solve the two phase approach according to a Euler-Euler scheme. Several series of simulations have been carried out in order to assess the influence of the slot position and trap design on efficiency. The results obtained agree with previous empirical findings, and allow confirmation (in a more reliable manner than before) that the best sediment trap design involves a centrally-placed slot with the two plates covering the trap reservoir placed at the same height as one another.

Download Full-text

Analysis of Bed Load Sediment Texture

SpringerBriefs in Earth Sciences - Sedimentation in the Rupnarayan River ◽

10.1007/978-3-319-62304-7_6 ◽

2017 ◽

pp. 79-96

Author(s):

Swapan Kumar Maity ◽

Ramkrishna Maiti

Keyword(s):

Bed Load ◽

Sediment Texture ◽

Load Sediment

Download Full-text

Experimental evidence of statistical ensemble behavior in bed load sediment transport

Journal of Geophysical Research Earth Surface ◽

10.1002/2015jf003552 ◽

2015 ◽

Vol 120 (11) ◽

pp. 2298-2317 ◽

Cited By ~ 34

Author(s):

Siobhan L. Fathel ◽

David Jon Furbish ◽

Mark W. Schmeeckle

Keyword(s):

Sediment Transport ◽

Experimental Evidence ◽

Statistical Ensemble ◽

Bed Load ◽

Load Sediment

Download Full-text

Room Acoustic Modelling Techniques: A Comparison of a Scale Model and a Computer Model for a New Opera Theatre

Building Acoustics ◽

10.1260/1351-010x.18.3-4.259 ◽

2011 ◽

Vol 18 (3-4) ◽

pp. 259-280 ◽

Cited By ~ 3

Author(s):

Jens Holger Rindel

Keyword(s):

Satisfactory Agreement ◽

Computer Simulations ◽

Computer Model ◽

Computer Modelling ◽

Computer Models ◽

Scale Model ◽

Acoustic Design ◽

Acoustic Modelling ◽

Scale Modelling ◽

Modelling Techniques

Today most acoustic consultants are using room acoustic computer models as a basis for their acoustic design. However, room acoustic scale modelling is still being used for the design in some major projects, although the costs and the time needed are significantly larger than those related to computer modelling. Both techniques were used by the author in a project for a new opera theatre; first the acoustical design was based on computer simulations using the Odeon software, and next a 1:20 scale model was built and tested. In the paper the results obtained with the two different modelling techniques are compared, and in general a satisfactory agreement has been found. The advantages and drawbacks related to each of the modelling techniques are discussed.

Download Full-text