Wave-Induced Transport. Example: Acoustic Streaming

Wave-Induced Transport

Example: Acoustic Streaming

Acoustic Streaming (Quartz Wind) I

(Lenoir & Botton 2007)

Acoustic Streaming (Quartz Wind) II

(Lenoir & Botton 2007)

Physics of Acoustic Streaming(Eckart 1948; Lighthill 1978)

Solar Atmospheric & Internal Structure

(NASA/ESA 2006)

Surface & Internal Rotation(Thompson et al. 2003)

Solar Magnetism

(Arlt 2003)

(Dikpati 2010)

The Sun (7/2/10)

Ideal Magnetohydrodynamics I

Ideal Magnetohydrodynamics II

Alfvén Waves I

Alfvén Waves II

Solar Coronal Temperature & Density

(Meyer-Vernet 2007)

Necessity of Coronal Expansion

Observed Solar Wind SpeedUlysses (1992-2009) (McComas et al. 2003)

Solar Wind Properties(Hansteen 2009)

Constraints on Acceleration Mechanisms

(Leer & Holzer 1980)

Alfvén Waves in the Solar Wind Mariner 5 (Venus 1967) (Belcher & Davis 1971)

Alfvén Waves in the Solar Corona(Tomczyk et al. 2007)

Alfvén Waves in the ChromosphereSolar Optical Telescope – Hinode (McIntosh et al. 2010)

Spicules

Alfvén Wave-Driven Wind Model

Wave Amplitudes in a Steady Flow

Wave-Modified Thermally Driven Wind

Wave Amplitudes

Wave Energy Flux

Wind Force Balance

Winds with Non-WKB Alfvén Waves I

Winds with Non-WKB Alfvén Waves II

Winds with Non-WKB Alfvén Waves III

Gravity Waves I

Gravity Waves II

Gravity Wave Propagation I

Gravity Wave Propagation II(Mowbray & Rarity 1967)

Gravity Wave Excitation IIce-Water Convection Experiment

(Malkus 1960; Townsend 1964; Adrian 1975)

(M. MacGregor 2004)

Gravity Wave Excitation II

(Townsend 1964)

Gravity Wave Excitation III(Ansong & Sutherland 2010)

Gravity Wave Excitation IV

(Rogers & Glatzmaier 2005; Rempel 2004)

Gravity Wave - Shear Flow Interaction

The Quasi-Biennial Oscillation(Baldwin et al. 2001)

The Plumb-McEwan Experiment (1978)

Gravity Wave-Driven FlowsWave Interactions with Tachocline Rotational Shear

Oscillatory Flow Properties

Origin of Oscillatory Behavior

Time-Dependent Flow Properties

(Thompson et al. 2003)

Gravity Waves & Internal Solar Rotation IInteraction of Waves with Non-uniform Rotation

Gravity Waves & Internal Solar Rotation II(Talon, Kumar, & Zahn 2002)

Conclusion/ExtensionsInteractions between small-scale waves and the media through which they propagate can have large-scale dynamical consequences in a variety of astrophysical systems

•Wave-dominated flows – winds from cool evolved stars•Radiative amplification of acoustic/Alfvén waves in hot star winds•Accretion-generated Alfvén/gravity waves in pre-MS objects

•Internal excitation of gravity modes by planetary companions

•Alfvén waves from satellite-planet, planet-star interactions

Some examples/possibilities: