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Investigation of the Importance of Spatial Resolution for Two-Dimensional Shallow-Water Model Accuracy (CROSBI ID 156536)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Družeta, Siniša ; Sopta, Luka ; Maćešić, Senka ; Črnjarić-Žic, Nelida Investigation of the Importance of Spatial Resolution for Two-Dimensional Shallow-Water Model Accuracy // Journal of hydraulic engineering-asce, 135 (2009), 11; 917-925. doi: 10.1061/(ASCE)0733-9429(2009)135:11(917)

Podaci o odgovornosti

Družeta, Siniša ; Sopta, Luka ; Maćešić, Senka ; Črnjarić-Žic, Nelida

engleski

Investigation of the Importance of Spatial Resolution for Two-Dimensional Shallow-Water Model Accuracy

The importance of spatial resolution for two-dimensional shallow-water model accuracy has been investigated by testing the effect of mesh refinement on two test cases based on laboratory dam-break experiments. A balanced first-order accurate upwind Q-Scheme and a second-order accurate upwind Hancock Monotone Upstream-centered Scheme for Conservation Laws scheme were both first validated on an analytical test, and then applied to the experimental dam-break test cases on four meshes of different density. Simulation results were evaluated through comparison of experimental and computed water level values at several available gauge points. Model sensitivity analysis showed that (1) mesh density was not critical for results accuracy ; (2) excessive mesh refinement somewhat deteriorated the results ; and (3) optimal spatial resolution was relatively low. Response is shown to be highly complex and no simple relation between spatial resolution and model accuracy has been found.

Shallow water; Two-dimensional flow; Two-dimensional models; Mesh generation; Sensitivity analysis; Spatial analysis

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Podaci o izdanju

135 (11)

2009.

917-925

objavljeno

0733-9429

10.1061/(ASCE)0733-9429(2009)135:11(917)

Povezanost rada

Građevinarstvo, Temeljne tehničke znanosti

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