Searched for: author%3A%22Henkes%2C+R.A.W.M.%22
(1 - 20 of 27)

Pages

List view
Grid view
document
Li, H. (author), Pourquie, M.J.B.M. (author), Ooms, G. (author), Henkes, R.A.W.M. (author)
DNS and RANS simulations were carried out for core-annular flow in a horizontal pipe and results were compared with experiments carried out with water and oil in our lab. In contrast to most existing studies for core-annular flow available in the literature, the flow annulus is not laminar but turbulent. This makes the simulations more...
journal article 2024
document
Buist, J.F.H. (author), Sanderse, B. (author), Dubinkina, S. (author), Oosterlee, C. W. (author), Henkes, R.A.W.M. (author)
In this paper we present a complete framework for the energy-stable simulation of stratified incompressible flow in channels, using the one-dimensional two-fluid model. Building on earlier energy-conserving work on the basic two-fluid model, our new framework includes diffusion, friction, and surface tension. We show that surface tension can...
journal article 2024
document
Buist, J.F.H. (author), Sanderse, Benjamin (author), Dubinkina, Svetlana (author), Oosterlee, C.W. (author), Henkes, R.A.W.M. (author)
The pressure-free two-fluid model (PFTFM) is a recent reformulation of the one-dimensional two-fluid model (TFM) for stratified incompressible flow in ducts (including pipes and channels), in which the pressure is eliminated through intricate use of the volume constraint. The disadvantage of the PFTFM was that the volumetric flow rate had to...
journal article 2023
document
Li, H. (author), Pourquie, M.J.B.M. (author), Ooms, G. (author), Henkes, R.A.W.M. (author)
The Reynolds-Averaged Navier Stokes (RANS) with the Launder & Sharma low-Reynolds number k−ε model was used to simulate core-annular flow in the same configuration with vertical upflow as considered by Kim & Choi (2018), who carried out Direct Numerical Simulations (DNS), and by Vanegas Prada (1999), who performed experiments. The DNS...
journal article 2023
document
Li, H. (author), Pourquie, M.J.B.M. (author), Ooms, G. (author), Henkes, R.A.W.M. (author)
Interfacial waves in core-annular pipe flow are studied through two-phase numerical simulations. Here the water annulus is turbulent, whereas the oil core stays laminar. The low-Reynolds number Launder & Sharma k−ε model is applied. By extracting the moving wave shape from the two-phase results and imposing this as a solid boundary in a...
journal article 2022
document
Li, H. (author), Pourquie, M.J.B.M. (author), Ooms, G. (author), Henkes, R.A.W.M. (author)
1D, 2D and 3D numerical simulations were carried out with the Reynolds-Averaged Navier-Stokes equations (RANS) for horizontal oil-water core-annular flow in which the oil core stays laminar while the water layer is turbulent. The turbulence is described with the Launder-Sharma low-Reynolds number k−ϵ model. The simulation results are compared...
journal article 2021
document
Jiang, J. (author), Li, H. (author), Pourquie, M.J.B.M. (author), Ooms, G. (author), Henkes, R.A.W.M. (author)
Core-annular flow is an efficient way of transporting viscous oil through a pipeline. A sharp increase in the pressure drop will occur when the oil waves at the water-oil interface touch the pipe wall. Depending on the oil and pipe material physical properties, the oil may adhere to the wall leading to fouling. Therefore, a necessary...
journal article 2021
document
Sanderse, B. (author), Buist, J.F.H. (author), Henkes, R.A.W.M. (author)
A novel pressure-free two-fluid model formulation is proposed for the simulation of one-dimensional incompressible multiphase flow in pipelines and channels. The model is obtained by simultaneously eliminating the volume constraint and the pressure from the widely used two-fluid model (TFM). The resulting ‘pressure-free two-fluid model’ (PF...
journal article 2021
document
Rahbari, A. (author), Brenkman, Jeroen (author), Hens, R. (author), Ramdin, M. (author), van den Broeke, L.J.P. (author), Schoon, Rogier (author), Henkes, R.A.W.M. (author), Moultos, O. (author), Vlugt, T.J.H. (author)
Hydrogen is one of the most popular alternatives for energy storage. Because of its low volumetric energy density, hydrogen should be compressed for practical storage and transportation purposes. Recently, electrochemical hydrogen compressors (EHCs) have been developed that are capable of compressing hydrogen up to P = 1000 bar, and have the...
journal article 2019
document
van Duin, Erik (author), Henkes, R.A.W.M. (author), Ooms, G. (author)
An experimental study has been made of oil-water core-annular flow in a horizontal pipe with special attention for the influence of the oil viscosity on the pressure drop. For that purpose a heating system has been installed and configured that is able to control the oil temperature, such that the oil viscosity could be varied between 3000 cSt...
journal article 2018
document
Schutte, K.C.J. (author), Portela, L. (author), Twerda, A. (author), Henkes, R.A.W.M. (author)
We have developed and applied an Eulerian-Lagrangian model for the transport, formation, break-up, deposition and re-entrainment of particle agglomerates. In this paper, we focus on agglomeration and break-up. Simulations were carried out to investigate what changes in the turbulent flow are inflicted by the presence of the agglomerates. Also...
journal article 2018
document
van Zwieten, J.S.B. (author), Sanderse, B. (author), Hendrix, M.H.W. (author), Vuik, Cornelis (author), Henkes, R.A.W.M. (author)
One-dimensional models for multiphase flow in pipelines are commonly discretised using first-order Finite Volume (FV) schemes, often combined with implicit time-integration methods. While robust, these methods introduce much numerical diffusion depending on the number of grid points. In this paper we propose a high-order, space-time...
journal article 2017
document
Ingen Housz, E.M.R.M. (author), Ooms, G. (author), Henkes, R.A.W.M. (author), Pourquie, M.J.B.M. (author), Kidess, A. (author), Radhakrishnan, R. (author)
An experimental and numerical study has been made of oil-water core-annular flow in a horizontal pipe with special attention for the turbulence in the water. An experimental set-up was built to be able to compare numerical predictions with detailed experimental results. The oil density was considerably smaller than the water density. Full 3D and...
journal article 2017
document
van Nimwegen, A.T. (author), Portela, L. (author), Henkes, R.A.W.M. (author)
In this work, we extend our previous efforts on the effect of surfactants on air-water flow in a vertical pipe by also considering pipe inclinations between 20° (with respect to horizontal) and vertical. For air-water flow, independent of the inclination, there is a regular annular flow at large gas flow rates, and an irregular churn or slug...
journal article 2016
document
Birvalski, M. (author), Tummers, M.J. (author), Henkes, R.A.W.M. (author)
An experimental study was performed in stratified wavy flow of air and water through a horizontal pipe. The velocity fields in both phases were measured simultaneously using PIV and the interfacial shape was resolved using a profile capturing technique. The objective of the study was to investigate the interfacial characteristics and the...
journal article 2016
document
Van Zwieten, J.S.B. (author), Sanderse, B. (author), Hendrix, M.H.V. (author), Vuik, C. (author), Henkes, R.A.W.M. (author)
One-dimensional models for multiphase flow in pipelines are commonly discretised using first-order Finite Volume (FV) schemes, often combined with implicit time-integration methods. While robust, these methods introduce much numerical diffusion depending on the number of grid points. In this paper we propose a high-order, space-time...
report 2015
document
Birvalski, M. (author), Tummers, M. (author), Delfos, R. (author), Henkes, R.A.W.M. (author)
The technique for obtaining detailed velocity fields in a wavy liquid layer in stratified air/water pipe flow is described in this paper. By combining Particle Image Velocimetry (PIV) with an interface detection technique, the velocity field is resolved in the whole liquid layer. Furthermore, since the shape of the interface is resolved at each...
conference paper 2013
document
Henkes, R.A.W.M. (author)
public lecture 2010
document
Henkes, R.A.W.M. (author), Van Ingen, J.L. (author)
The boundary layer along the fuselage, wings and tailplanes of aircraft will usually be laminar at the leading edge and will become unstable further downstream. Once the boundary layer has become unstable it will undergo transition to turbulence. Stability and transition can be considered as one of the most complex problems of fluid dynamics....
book 1998
document
Westin, K.J.A. (author), Henkes, R.A.W.M. (author)
Boundary layer transition induced by high levels of free stream turbulence (FSl), so called bypass transition, can not be predicted with conventional stability calculations (e.g. the en-method). The use of turbulence models for transition prediction has shown some success for this type of flows, and the present study is a further investigation...
book 1998
Searched for: author%3A%22Henkes%2C+R.A.W.M.%22
(1 - 20 of 27)

Pages

List view
Grid view