1 Contributo su Rivista

1 Contributo su Rivista: [2217] Home page macrotipologia

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Multi-physics modelling and sensitivity analysis of olympic rowing boat dynamics

A multidisciplinary approach is implemented to model and analyse the performance of Olympic rowing boats. A reduced-order model that couples rowers motions with the hull, oars and hydrodynamic and hydrostatic forces is detailed. This model is complemented with a sensitivity analysis carried out by means of a non-intrusive polynomial chaos expansion. Sensitivity analysis results for two different boat classes, namely, a lightweight single scull and a coxless four are presented and discussed. T...

Fluid-structure interaction problems in free surface flows: Application to boat dynamics

n this paper, we present some recent studies on fluid–structure interaction problems in the presence of free surface flow. We consider the dynamics of boats simulated as rigid bodies. Several hydrodynamic models are presented, ranging from full Reynolds averaged Navier–Stokes equations to reduced models based on potential flow theory.

Positive moods are all alike? Differential affect amplification effects of ‘elated’versus ‘calm’mental imagery in young adults reporting hypomanic-like experiences

Positive mood amplification is a hallmark of the bipolar disorder spectrum (BPDS). We need better understanding of cognitive mechanisms contributing to such elevated mood. Generation of vivid, emotionally compelling mental imagery is proposed to act as an ‘emotional amplifier’ in BPDS. We used a positive mental imagery generation paradigm to manipulate affect in a subclinical BPDS-relevant sample reporting high (n = 31) vs. low (n = 30) hypomanic-like experiences on the Mood Disorder Question...

Pressure data-driven variational multiscale reduced order models

In this paper, we develop data-driven closure/correction terms to increase the pressure and velocity accuracy of reduced order models (ROMs) for fluid flows. Specifically, we propose the first pressure-based data-driven variational multiscale ROM, in which we use the available data to construct closure/correction terms for both the momentum equation and the continuity equation. Our numerical investigation of the two-dimensional flow past a circular cylinder at Re=50,000 in the marginally-reso...

A three-dimensional model for the dynamics and hydrodynamics of rowing boats

This paper proposes a new model describing the dynamics of a rowing boat for general three-dimensional motions. The complex interaction between the different components of the rowers-oars-boat system is analysed and reduced to a set of ordinary differential equations governing the rigid motion along the six degrees of freedom. To treat the unstable nature of the physical problem, a rather simple (but effective) control model is included, which mimics the main active control techniques adopted...

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