Searched for: author%3A%22Hogendoorn%2C+W.J.%22
(1 - 11 of 11)
document
Hogendoorn, W.J. (author), Breugem, W.P. (author), Frank, David (author), Bruschewski, Martin (author), Grundmann, Sven (author), Poelma, C. (author)
Magnetic resonance imaging (MRI) experiments have been performed in conjunction with direct numerical simulations (DNS) to study neutrally buoyant particle-laden pipe flows. The flows are characterized by the suspension liquid Reynolds number (Res), based on the bulk liquid velocity and suspension viscosity obtained from Eilers' correlation,...
journal article 2023
document
Hogendoorn, W.J. (author), Chandra, B. (author), Poelma, C. (author)
We propose a scaling law for the onset of turbulence in pipe flow of neutrally buoyant suspensions. This scaling law, based on a large set of experimental data, relates the amplitude of the particle-induced perturbations ε to the critical suspension Reynolds number Res,c. Here ε is a function of the particle-to-pipe diameter ratio and the volume...
journal article 2022
document
Dash, A. (author), Hogendoorn, W.J. (author), Oldenziel, G. (author), Poelma, C. (author)
Abstract: Ultrasound imaging velocimetry (UIV) refers to the technique wherein ultrasound images are analysed with 2D cross-correlation techniques developed originally in the framework of particle image velocimetry. Applying UIV to opaque, particle-laden multiphase flows have long been considered to be an attractive prospect. In this study,...
journal article 2022
document
Hogendoorn, W.J. (author), Frank, David (author), Bruschewski, Martin (author), Poelma, C. (author)
Using magnetic resonance imaging we are able to obtain average velocity and volume fraction profiles in a pipe flow with a neutrally buoyant suspension. In this experimental work, the effect of increasing Reynolds number and particle volume fraction on shear-induced migration is studied. For increasing bulk volume fraction, the initially...
conference paper 2022
document
Hogendoorn, W.J. (author)
Suspension flows are abundantly present in nature and industry. Typical examples include volcanic ash clouds, sediment transport in rivers, blood flow through human capillaries and the dredging industries. Accurate models of suspension flows are of key importance for prediction, optimization and control of particle-laden flows, especially in...
doctoral thesis 2021
document
Dash, A. (author), Hogendoorn, W.J. (author), Poelma, C. (author)
Abstract: We discuss empirical techniques to extract quantitative particle volume fraction profiles in particle-laden flows using an ultrasound transducer. A key step involves probing several uniform suspensions with varying bulk volume fractions from which two key volume fraction dependent calibration parameters are identified: the peak...
journal article 2021
document
Hogendoorn, W.J. (author), Chandra, B. (author), Poelma, C. (author)
Particle-laden pipe flows exhibit a gradual laminar-turbulent transition, beyond a critical volume fraction (φ). While classical transition behavior is characterized by the presence of turbulent puffs, this intermittent nature is absent for particle-induced transition. For small pipe-to-particle diameter ratios (D/d) even dilute systems...
journal article 2021
document
John, Kristine (author), Jahangir, S. (author), Gawandalkar, U.U. (author), Hogendoorn, W.J. (author), Poelma, C. (author), Grundmann, Sven (author), Bruschewski, Martin (author)
This study focuses on the measurement accuracy of Magnetic Resonance Velocimetry (MRV) in high-speed turbulent flows. One of the most prominent errors in MRV is the displacement error, which describes the misregistration of spatial coordinates and velocity components in moving fluids. Displacement errors are particularly critical for experiments...
journal article 2020
document
Hogendoorn, W.J. (author), Poelma, C. (author)
Using ultrasound in plane wave imaging mode, in combination with a proper processing strategy and the covariance function approach, we can not only better estimate the actual turbulence statistics, but we are also able to measure turbulent flows with much higher Reynolds numbers. Optimising the processing strategy by using a sliding correlation...
conference paper 2019
document
Jahangir, S. (author), Hogendoorn, W.J. (author), Poelma, C. (author)
Partial cavitation dynamics in an axisymmetric converging-diverging nozzle are investigated experimentally. Shadowgraphy is used to visualize and analyze different cavitation regimes. These regimes are generated by changing the global static pressure and flow velocity independently. Cloud cavitation is the most interesting and complex regime,...
journal article 2018
document
Hogendoorn, W.J. (author), Poelma, C. (author)
Using ultrasound imaging velocimetry, we are able to present unique insight in transitional particle-laden flows. Together with a Moody diagram of time-averaged properties, we demonstrate that the laminar-turbulent transition behavior at high volume fractions is distinct from the single-phase case and cases with low volume fractions. For low...
journal article 2018
Searched for: author%3A%22Hogendoorn%2C+W.J.%22
(1 - 11 of 11)