Experimental device and numerical support in order to study mudflows: its laws of evolution, runout distances and velocity field

• Grant number: 20/07822-0
• Support Opportunities: Regular Research Grants
• Start date: February 01, 2021
• End date: July 31, 2023
• Field of knowledge: Engineering - Civil Engineering - Hydraulic Engineering
• Principal Investigator: Geraldo de Freitas Maciel
• Grantee: Geraldo de Freitas Maciel
• Host Institution: Faculdade de Engenharia (FEIS). Universidade Estadual Paulista (UNESP). Campus de Ilha Solteira. Ilha Solteira , SP, Brazil
• Associated researchers: Fabiana de Oliveira Ferreira ; Fábio Roberto Chavarette

Abstract

If the dam break problem is a long standing studied subject, since the classical works of Ritter, Dressler and Stoker, along with many others in the theoretical and experimental point of view, mainly through commercial softwares well-stablished from the literature (Dambreak models), there will be found, on the other hand, a small number of works about eventual tailings dam breaks and even a smaller number of them that treat, in a critical sense, the hydrodynamic aspects of the enormous volumes released from this type of accident tied to the flowing fluid's rheology. Based on this motivation, this doctorate research has as a general objective to determine the hydrographs produced by the "gradual" and "instantaneous" opening gate (dam-break type) and its influence on the evolution of the velocity of fronts (and runout distances) of viscoplastic materials (kaolinitic clay and Carbopol gels), as well as measure the velocity profile over the flow's depth. Structured on three (3) parts that complete themselves, the project provides experimental tests which will be done in a laboratory (controlled situation), using automated devices and precision equipments (sonic transducers, laser, high resolution digital cameras, etc). The various experimental settings will be fully monitored in plan and profile view, over an inclined plane and channel, which should total about 280 tests. Finally, it's worth pointing out that the expected impact of the project is at the complete understanding of the hydrodynamic process of dam break phenomena (with repercussion in the risks management area) and in the implementation of a velocity profile measurement system along depth the viscoplastic fluid flow, by means of the image velocimetry technique (STIV) in laboratory channels, which gives originality and novelty. (AU)

Scientific publications

(5)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

SAO, YURI TAGLIERI; PEREIRA, JOAO BATISTA; MACIEL, GERALDO DE FREITAS. Evaluation of shear rate formulations through steady uniform non-Newtonian fluid flows in the context of shallow-water equations. RBRH-REVISTA BRASILEIRA DE RECURSOS HIDRICOS, v. 28, p. 12-pg., 2023-01-01. (22/05184-1, 20/07822-0)

SAO, YURI TAGLIERI; MACIEL, GERALDO DE FREITAS. Accuracy of viscosity regularization models employed by computational fluid dynamics codes. Journal of the Brazilian Society of Mechanical Sciences and Engineering, v. 45, n. 10, p. 13-pg., 2023-10-01. (22/05184-1, 20/07822-0)

MACIEL, GERALDO DE FREITAS; TONIATI, ANDRE LUIS; FERREIRA, FABIANA DE OLIVEIRA; SAO, YURI TAGLIERI. Roll wave prediction model of Herschel-Bulkley fluids evolving on porous bottom. Journal of Non-Newtonian Fluid Mechanics, v. 295, SEP 2021. (15/25518-8, 20/07822-0)

FERREIRA, FABIANA DE OLIVEIRA; MACIEL, GERALDO DE FREITAS; PEREIRA, JOAO BATISTA. Roll waves and their generation criteria. RBRH-REVISTA BRASILEIRA DE RECURSOS HIDRICOS, v. 26, 2021. (20/07822-0)

PEREIRA, J. B.; MACIEL, G. F.. Automated slump test: An effective alternative in predicting rheological properties and an efficient tool for providing the quality control of materials. MEASUREMENT, v. 178, JUN 2021. (20/07822-0)