Ultrasonic Time-of-Flight Tomography for the Non-Intrusive Measurement of Flow Velocity Fields

Hauck, A.

doi:10.1007/978-1-4615-3692-5_34

Cited by 7 publications

(2 citation statements)

References 3 publications

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“…In other industries such as the chemical or food industry, the routine use of this technique has to be restricted to ensure the sensitivity of the experiment and the safety of the experimentor; so for routine use alternative techniques have to be based on electrical, optical and ultrasound principles. These are reported in [10][11][12][13][14][15][16], among others.…”

Section: Introductionmentioning

confidence: 77%

Process tomography applied to multi-phase flow measurement

Dyakowski

1996

Meas. Sci. Technol.

115

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This paper presents the state of the art in measuring multi-phase flows by using tomographic techniques. The results presented show a wide range of industrial applications of process tomography from the nuclear and chemical to the food industry. This is illustrated by examples of the application of various tomographic sensors to the measurement of geometric or kinematic parameters of multi-phase flows. An application of process tomography for the validation of computational fluid dynamic models and the possibility of constructing a flowmeter for multi-phase flow are addressed.

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Section: Introductionmentioning

confidence: 77%

Process tomography applied to multi-phase flow measurement

Dyakowski

1996

Meas. Sci. Technol.

115

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“…Using spatial cross-correlation, these authors attempted to determine the velocity of the moving textures in the heterogeneous flow field. An ultrasonic time-of-flight tomography technique was applied by Hauck (1991) for imaging the three-dimensional velocity field of a moving fluid. Their objective was to experi-mentally verify a reconstruction algorithm proposed for mapping the velocity field of a two-phase flow system in a cylindrical tube with a 120 mm diameter.…”

Section: Positron Emission Tomography the Positron Emission Tomograph...mentioning

confidence: 99%

Noninvasive Tomographic and Velocimetric Monitoring of Multiphase Flows

Chaouki

Larachi

Duduković

1997

Ind. Eng. Chem. Res.

274

149

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A condensed review of recent advances accomplished in the development and the applications of noninvasive tomographic and velocimetric measurement techniques to multiphase flows and systems is presented. In recent years utilization of such noninvasive techniques has become widespread in many engineering disciplines that deal with systems involving two immiscible phases or more. Tomography provides concentration, holdup, or 2D or 3D density distribution of at least one component of the multiphase system, whereas velocimetry provides the dynamic features of the phase of interest such as the flow pattern, the velocity field, the 2D or 3D instantaneous movements, etc. The following review is divided into two parts. The first part summarizes progress and developments in flow imaging techniques using γ-ray and X-ray transmission tomography; X-ray radiography; neutron transmission tomography and radiography; positron emission tomography; X-ray diffraction tomography; nuclear magnetic resonance imaging; electrical capacitance tomography; optical tomography; microwave tomography; and ultrasonic tomography. The second part of the review summarizes progress and developments in the following velocimetry techniques: positron emission particle tracking; radioactive particle tracking; cinematography; laser-Doppler anemometry; particle image velocimetry; and fluorescence particle image velocimetry. The basic principles of tomography and velocimetry techniques are outlined, along with advantages and limitations inherent to each technique. The hydrodynamic and structural information yielded by these techniques is illustrated through a literature survey on their successful applications to the study of multiphase systems in such fields as particulate solids processes, fluidization engineering, porous media, pipe flows, transport within packed beds and sparged reactors, etc.

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Investigating a stretched vortex with ultrafast two-dimensional ultrasonic speckle velocimetry

2001

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Ultrasonic speckle velocimetry (USV) was recently introduced as a new ultrafast tool for measuring fluid velocities in two dimensions by analyzing the speckle signal backscattered from particles moving with the flow [Sandrin et al., Appl. Phys. Lett. 78, 1155 (2001)]. An experimental study of a stationary stretched vortex is presented, which demonstrates the efficiency of ultrafast 2D USV in terms of quantitative assessment of vortical flows. The full velocity field is recovered and compared to the Burgers model for two different fluids: water and milk. The dependence of the vortex characteristics on the main control parameter is investigated.

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Ultrasonic Time-of-Flight Tomography for the Non-Intrusive Measurement of Flow Velocity Fields

Cited by 7 publications

References 3 publications

Process tomography applied to multi-phase flow measurement

Process tomography applied to multi-phase flow measurement

Noninvasive Tomographic and Velocimetric Monitoring of Multiphase Flows

Investigating a stretched vortex with ultrafast two-dimensional ultrasonic speckle velocimetry

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