Numerical study of acoustic streaming and radiation forces on micro particles

Mads Jakob Herring Jensen; Peter Barkholt Muller; Rune Barnkob; Henrik Bruus

Numerical study of acoustic streaming and radiation forces on micro particles

Mads Jakob Herring Jensen, Peter Barkholt Muller, Rune Barnkob, Henrik Bruus

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Abstract

We present a numerical study of the transient motion of micro particles in a microfluidic chip when influenced by acoustic forces. The system is driven in the MHz range and tuned to resonance. The forces on the particles are twofold: 1) acoustic radiation forces acting directly on the particles, and 2) Stokes drag from the induced acoustic streaming flow. Both effects are second order and require the solution of the full linearized Navier-Stokes equation in order to be captured correctly. The model shows the transition from streaming drag to radiation force dominated regimes. The transition is studied in terms of the particle size.

Original language	English
Title of host publication	Proceedings of BNAM2012
Editors	Peter Juhl
Number of pages	8
Place of Publication	Odense
Publisher	Nordic Acoustic Association
Publication date	2012
ISBN (Electronic)	978-87-995400-0-6
Publication status	Published - 2012
Event	Joint Baltic-Nordic Acoustics Meeting 2012 - Odense, Denmark Duration: 18 Jun 2012 → 20 Jun 2012

Conference

Conference	Joint Baltic-Nordic Acoustics Meeting 2012
Country/Territory	Denmark
City	Odense
Period	18/06/2012 → 20/06/2012

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title = "Numerical study of acoustic streaming and radiation forces on micro particles",

abstract = "We present a numerical study of the transient motion of micro particles in a microfluidic chip when influenced by acoustic forces. The system is driven in the MHz range and tuned to resonance. The forces on the particles are twofold: 1) acoustic radiation forces acting directly on the particles, and 2) Stokes drag from the induced acoustic streaming flow. Both effects are second order and require the solution of the full linearized Navier-Stokes equation in order to be captured correctly. The model shows the transition from streaming drag to radiation force dominated regimes. The transition is studied in terms of the particle size.",

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year = "2012",

language = "English",

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note = "Joint Baltic-Nordic Acoustics Meeting 2012, BNAM 2012 ; Conference date: 18-06-2012 Through 20-06-2012",

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T1 - Numerical study of acoustic streaming and radiation forces on micro particles

AU - Jensen, Mads Jakob Herring

AU - Muller, Peter Barkholt

AU - Barnkob, Rune

AU - Bruus, Henrik

PY - 2012

Y1 - 2012

N2 - We present a numerical study of the transient motion of micro particles in a microfluidic chip when influenced by acoustic forces. The system is driven in the MHz range and tuned to resonance. The forces on the particles are twofold: 1) acoustic radiation forces acting directly on the particles, and 2) Stokes drag from the induced acoustic streaming flow. Both effects are second order and require the solution of the full linearized Navier-Stokes equation in order to be captured correctly. The model shows the transition from streaming drag to radiation force dominated regimes. The transition is studied in terms of the particle size.

AB - We present a numerical study of the transient motion of micro particles in a microfluidic chip when influenced by acoustic forces. The system is driven in the MHz range and tuned to resonance. The forces on the particles are twofold: 1) acoustic radiation forces acting directly on the particles, and 2) Stokes drag from the induced acoustic streaming flow. Both effects are second order and require the solution of the full linearized Navier-Stokes equation in order to be captured correctly. The model shows the transition from streaming drag to radiation force dominated regimes. The transition is studied in terms of the particle size.

M3 - Article in proceedings

BT - Proceedings of BNAM2012

A2 - Juhl, Peter

PB - Nordic Acoustic Association

CY - Odense

T2 - Joint Baltic-Nordic Acoustics Meeting 2012

Y2 - 18 June 2012 through 20 June 2012

ER -

Numerical study of acoustic streaming and radiation forces on micro particles

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