Davide Vettori

Davide Vettori
Politecnico di Torino | polito · DIATI - Department of Environment, Land and Infrastructure Engineering

PhD

About

24
Publications
3,538
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182
Citations
Introduction
I am a MSCA research fellow at Politecnico di Torino currently working on flow-eelgrass-sediments interactions (SHIEELD project). My research interests embrace several topics with particular focus on flow-biota interactions, turbulence, fluid-solid interactions, biomechanics and sediment transport processes.

Publications

Publications (24)
Article
Full-text available
Turbulent flows over a large surface area (S) covered by n obstacles experience an overall drag due to the presence of the ground and the protruding obstacles into the flow. The drag partition between the roughness obstacles and the ground is analyzed using an analytical model proposed by Raupach (Boundary-Layer Meteorol 60:375-395, 1992) and is he...
Preprint
Full-text available
One of the main statistical features of near-neutral atmospheric boundary layer (ABL) turbulence is the positive vertical velocity skewness $Sk_w$ above the roughness sublayer or the buffer region in smooth-walls. The $Sk_w$ variations are receiving renewed interest in many climate-related parameterizations of the ABL given their significance to cl...
Preprint
Full-text available
We provide empirical evidence that within the inertial sub layer of adiabatic turbulent flows over smooth walls, the skewness of the vertical velocity component $Sk_w$ displays universal behaviour, being constant and constrained within the range $Sk_w \approx 0.1-0.16$, regardless of flow configuration and Reynolds number. A theoretical model is pr...
Preprint
Full-text available
Turbulent flows over a large surface area (S) covered by n obstacles experience an overall drag due to the presence of the ground and the protruding obstacles into the flow. The drag partition between the roughness obstacles and the ground is analyzed using an analytical model proposed by Raupach (1992) and is hereafter referred to as R92. The R92...
Article
The paper reports the results of laboratory experiments to investigate the effect of vegetation patch mosaics on hydraulic resistance. Experiments were run for seven levels of vegetation coverage with square patches of flexible plastic grass in aligned and staggered configurations and a wide range of hydraulic conditions. Hydraulic resistance was s...
Article
Full-text available
Alternative water treatment techniques are needed to overcome the limitations of chemical disinfectants. Stemming from recent findings which point to high levels of shear stress induced by flow as the cause of microbial removal in water, we conducted systematic experiments on bacterial solutions in well-controlled hydrodynamic conditions to evaluat...
Article
Full-text available
The importance of two‐way interactions between animals and the physical hydraulic and sedimentological environment are increasingly recognized (e.g., zoogeomorphology). Caddisflies (Trichoptera) are a group of aquatic insects known for their bioconstructions, particularly cases built from fine sediment and silk. Caddisfly cases differ in size, shap...
Article
Full-text available
This work investigates how turbulence in open-channel flows is altered by the passage of surface waves by using experimental data collected with laboratory tests in a large-scale flume facility, wherein waves followed a current. Flow velocity data were measured with a laser Doppler anemometer and used to compute profiles of mean velocity and Reynol...
Article
Full-text available
Live plants are increasingly used in hydraulic laboratories to investigate flow‐vegetation interactions. In such experiments, they are often exposed to stressful handling and storage that can cause strong physiological responses and modifications in plant biomechanics. Little is known about the potential effect of these impacts on the performance o...
Article
Full-text available
Seagrasses are marine flowering plants that have important roles in the ecological and physical processes of many coastal areas. Seagrass modeling to date has mostly assumed that seagrasses have uniform biomechanical traits in space and time. In this study we compare the biomechanical traits of Zostera marina blades collected in late summer and spr...
Article
Previous research has shown that seaweed health status and photosynthetic activity are reduced due to hyposaline stress, but its effects on seaweed physical properties are unknown. In this study, we begin to address this knowledge gap by investigating the effects of hyposaline stress on the morphological and mechanical properties of the kelp Saccha...
Article
Submerged freshwater macrophytes are frequently used in hydraulic laboratories to study flow–plant interactions and the role of plants in aquatic ecosystems, but environmental conditions in flume facilities are often suboptimal for plants and can cause plant stress. Physiological responses of plants under stress can trigger modifications in plant b...
Article
Full-text available
Physical interactions between seaweed blades of Saccharina latissima and unidirectional turbulent flow were examined in an open-channel flume, focussing on flow velocities, drag force acting on a blade, and blade reconfiguration. The data reveal that seaweed blades adjust to high-energy flow conditions relatively quickly, efficiently reducing flow-...
Article
Full-text available
This paper reports the morphology of a natural patch of Ranunculus penicillatus and presents high-resolution measurements of flow velocities in its wake using a stereoscopic PIV field measurement system. The patch was 3.80 m long, 1.24 m wide and caused substantial changes to downstream mean velocities and turbulence. Vertical profiles of streamwis...
Article
Vegetation surrogates have been extensively used in laboratory experiments for studying flow–vegetation interactions. However, it remains unclear how accurately the surrogates replicate the prototype vegetation in terms of hydrodynamic performance, even when similarity conditions are followed. To address this matter, we compare the hydrodynamic per...
Conference Paper
Full-text available
Aquatic plants such as macrophytes and bryophytes inhabit many of the river systems around the world. They are primary producers that provide a 3D substrate matrix for invertebrates and small fish, but at high levels of instream biomass they can have a significant impact on flow conveyance and sediment transport. Investigation of flow interactions...
Conference Paper
Interactions between flow and vegetation are widely investigated because vegetation is a primary factor controlling channel ecohydraulics, nearshore hydraulics and flood risk. Laboratory experiments are a critical tool in this research area and, to adequately represent the complexity of natural ecosystems, live plants, rather than artificial surrog...
Article
Full-text available
Flow–vegetation interactions is an interdisciplinary research area with applications in the management of coastal waters, lakes, and watercourses. Due to an emerging interest in the cultivation of seaweeds, this study seeks to develop a sound understanding of the physical interactions between flow and seaweeds. This is achieved via experiments in a...
Article
Interactions between water flow and aquatic vegetation strongly depend on morphological and biomechanical characteristics of vegetation. Although any physical or numerical model that aims to replicate flow-vegetation interactions requires these characteristics, information on morphology and mechanics of vegetation living in coastal waters remains i...
Conference Paper
Full-text available
Flow-vegetation interactions occur at a wide range of scales, from the sub-leaf to the patch mosaic or river reach scale. At the larger scales, vegetation such as aquatic macrophytes can alter the flow, creating regions of enhanced or reduced turbulence and bed shear stress. This flow alteration can manifest as deposition of fine sediment in the wa...

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