Publications de David Ferràs Segura

Hydraulic transients in hydropower systems: from theory to practice

Anton Schleiss, Giovanni De Cesare, David Ferràs Segura

2020

Fluid structure interaction in straight pipelines with different anchoring conditions

Anton Schleiss, Pedro Filipe De Almeida Manso, David Ferràs Segura

This investigation aims at assessing the fluid-structure interaction (FSI) occurring during hydraulic transients in straight pipeline systems fixed to anchor blocks. A two mode 4-equation model is implemented incorporating the main interacting mechanisms: ...

Elsevier2017

Fluid–structure interaction in pipe coils during hydraulic transients

Anton Schleiss, Pedro Filipe De Almeida Manso, David Ferràs Segura

The paper presents the analysis of fluid–structure interaction occurring during hydraulic transients in pipe coils by means of a four-equation model. The purpose is to understand and describe the effect of the coil movement on the transient wave. The four- ...

Taylor & Francis Ltd2017

Fluid-structure interaction in straight pipelines: Friction coupling mechanisms

Anton Schleiss, Pedro Filipe De Almeida Manso, David Ferràs Segura

The present paper approaches fluid-structure interaction by means of a 4-equation model. Experimental data collected from a straight copper pipe-rig lying directly on the lab floor is used for the model validation in terms of wave shape, timing and damping ...

Elsevier2016

Fluid-structure interaction during hydraulic transients in pressurized pipes : experimental and numerical analyses

David Ferràs Segura

The aim of the present research is to identify, describe and quantify the principal mechanic-hydraulic relationships during hydraulic transients in pressurized pipe flows in view of improving pipe design and reduce pipe and system failure. Phenomena affect ...

EPFL2016

Fluid-structure-interaction in pipe coils during hydraulic transients: numerical and experimental analysis

David Ferràs Segura

The paper presents the analysis of the effect of Fluid-Structure Interaction (FSI) occurring during hydraulic transients in pipe coils, in particular the main developments and findings. The research work comprises the development of mathematical models, th ...

2015

Hydraulic transients in straight and coil pipe rigs

Anton Schleiss, Pedro Filipe De Almeida Manso, David Ferràs Segura

Transient pressure waves in real pipe systems are affected by several phenomena not accounted for in the classic waterhammer theory. Damping mechanisms are differently manifested according to the material, configuration and existing features of pipe system ...

2015

Stress-strain analysis of a coiled copeer pipe for inner pressure loads

Anton Schleiss, David Ferràs Segura

Faculty of Engineering of University of Porto2014

Hydrological modelling of the Zambezi River Basin taking into account floodplain behaviour by a modified reservoir approach

Anton Schleiss, José Pedro Gamito de Saldanha Calado Matos, Théodora Cohen Liechti, David Ferràs Segura

Floodplains are regions of great interest for environmental assessment as they constitute important ecological reserves and contribute efficiently to natural flood attenuation. However, the implementation of a model describing the basic hydrological behavi ...

2014

Stress–strain analysis of a toric pipe for inner pressure loads

Anton Schleiss, David Ferràs Segura

This research aims to enhance the knowledge on stress–strain states of a coiled pipe used for Hydraulic transient experiments. The membrane theory of shells of revolution has been applied for the description of axial and circumferential strains while an in ...

Elsevier2014