Publications related to Heat Transfer Augmentation in a Straight Channel via Two Oscillating Circular Cylinders

Forced reattachment in separated flows: a variational approach to recirculation length reduction

Sensitivity analysis is used to design an open-loop control for separated flows. The length of the recirculation region

l_c

is expressed as a cost functional, and its sensitivity to actuation is derived analytically. This analysis allows to identify regi ...

2013

Effect of Hydrofoil Trailing Edge Geometry on the Wake Dynamics

Amirreza Zobeiri

In the present study, the effect of a hydrofoil trailing edge shape on the wake dynamic and its interaction with the mechanical structure is investigated. This would help better describe the physical reasons for vibration reduction when using oblique and D ...

EPFL2012

Thermocouple Thermal Inertia Effects on Impingement Heat Transfer Experiments Using the Transient Liquid Crystal Technique

Peter Ott, Alexandros Terzis, Bernhard Weigand

The transient liquid crystal technique is widely used for impingement heat transfer experiments. Additionally, due to the difficulty of producing pure temperature steps in the flow, many authors assumed the fluid temperature evolution as a series of step c ...

Institute of Physics2012

The Effects of a Tripped Turbulent Boundary Layer on Vortex Shedding from a Blunt Trailing Edge Hydrofoil

François Avellan, Mohamed Farhat, Philippe Ausoni, Amirreza Zobeiri

Experiments on vortex shedding from a blunt trailing edge symmetric hydrofoil operating at zero angle of attack in a uniform high speed flow, Re-h = 16.1 . 10(3) - 96.6 . 10(3), where the reference length h is the trailing edge thickness, are reported. The ...

2012

A theory for the streamwise turbulent fluctuations in high Reynolds number pipe flow

A new theory for the streamwise turbulent fluctuations in fully developed pipe flow is proposed. The theory extends the similarities between the mean flow and the streamwise turbulence fluctuations, as observed in experimental high Reynolds number data, to ...

Cambridge University Press2012

Algebraic turbulence modeling in adiabatic and evaporating annular two-phase flow

John Richard Thome, Andrea Cioncolini

The study considers algebraic turbulence modeling in adiabatic and evaporating annular two-phase flow, focusing in particular on momentum and heat transfer (so-called 'convective boiling') through the annular liquid film. In contrast with single-phase wall ...

2011

Water-surface oscillations in channels with axi-symetric cavities

Anton Schleiss, Tobias Meile

Transverse or longitudinal movements of a water body are observed for flows along cavities, river embayments, groyne fields or harbours. They are significant for certain flow conditions and geometrical properties. To study the effect of large-scale roughne ...

2011

Open-loop control of compressible afterbody flows using adjoint methods

Philippe Meliga

The flow past an axisymmetric body is generically unstable to a steady and a time-periodic global instability, the latter being thought to lead the low-frequency unsteadiness of the wake even at larger Reynolds numbers. The present paper examines how the g ...

2010

Numerical Modeling of Annular Laminar Film Condensation in Circular and Non-Circular Micro-Channels under Normal and Micro-Gravity

Stefano Nebuloni

A theoretical and numerical model to predict film condensation heat transfer in mini, micro and ultra micro-channels of different internal shapes is presented in this thesis. The model is based on a finite volume formulation of the Navier-Stokes and energy ...

EPFL2010

Localized edge states nucleate turbulence in extended plane {Couette} cells

Tobias Schneider

We study the turbulence transition of plane Couette flow in large domains where localized perturbations are observed to generate growing turbulent spots. Extending previous studies on the boundary between laminar and turbulent dynamics we determine invaria ...

2010

Heat Transfer Augmentation in a Straight Channel via Two Oscillating Circular Cylinders

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Forced reattachment in separated flows: a variational approach to recirculation length reduction

Effect of Hydrofoil Trailing Edge Geometry on the Wake Dynamics

Thermocouple Thermal Inertia Effects on Impingement Heat Transfer Experiments Using the Transient Liquid Crystal Technique

The Effects of a Tripped Turbulent Boundary Layer on Vortex Shedding from a Blunt Trailing Edge Hydrofoil

A theory for the streamwise turbulent fluctuations in high Reynolds number pipe flow

Algebraic turbulence modeling in adiabatic and evaporating annular two-phase flow

Water-surface oscillations in channels with axi-symetric cavities

Open-loop control of compressible afterbody flows using adjoint methods

Numerical Modeling of Annular Laminar Film Condensation in Circular and Non-Circular Micro-Channels under Normal and Micro-Gravity

Localized edge states nucleate turbulence in extended plane {Couette} cells

Numerical Modeling of Annular Laminar Film Condensation in Circular and Non-Circular Micro-Channels under Normal and Micro-Gravity

Open-loop control of compressible afterbody flows using adjoint methods

Thermocouple Thermal Inertia Effects on Impingement Heat Transfer Experiments Using the Transient Liquid Crystal Technique

Forced reattachment in separated flows: a variational approach to recirculation length reduction

Effect of Hydrofoil Trailing Edge Geometry on the Wake Dynamics

The Effects of a Tripped Turbulent Boundary Layer on Vortex Shedding from a Blunt Trailing Edge Hydrofoil

Water-surface oscillations in channels with axi-symetric cavities

A theory for the streamwise turbulent fluctuations in high Reynolds number pipe flow

Algebraic turbulence modeling in adiabatic and evaporating annular two-phase flow

Localized edge states nucleate turbulence in extended plane {Couette} cells