Search Results - "Deen, N.G"

Multiscale modeling of fixed-bed reactors with porous (open-cell foam) non-spherical particles: Hydrodynamics by Das, Saurish, Deen, N.G., Kuipers, J.A.M.

“…[Display omitted] An accurate numerical model is proposed to simulate flow through cylindrical fixed-bed reactors with randomly packed porous non-spherical…”
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Drag and heat transfer closures for realistic numerically generated random open-cell solid foams using an immersed boundary method by Das, Saurish, Sneijders, S., Deen, N.G., Kuipers, J.A.M.

“…[Display omitted] •A step-by-step method for generating periodic open-cell solid foam samples mimicking the actual foaming process.•Pore-scale direct numerical…”
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Numerical Simulation of Dense Gas-Solid Fluidized Beds : A Multiscale Modeling Strategy by VAN DER HOEF, M. A, VAN SINT ANNALAND, M, DEEN, N. G, KUIPERS, J. A. M

“…Gas-solid fluidized beds are widely applied in many chemical processes involving physical and/or chemical transformations, and for this reason they are the…”
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A study of heat transfer in fluidized beds using an integrated DIA/PIV/IR technique by Patil, Amit V., Peters, E.A.J.F., Sutkar, Vinayak S., Deen, N.G., Kuipers, J.A.M.

“…•Heat transfer in a fluidized beds is studied experimentally.•New measurement technique proposed: coupling IR with DIA and PIV.•Calibration of the infrared…”
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Review of discrete particle modeling of fluidized beds by Deen, N.G., Van Sint Annaland, M., Van der Hoef, M.A., Kuipers, J.A.M.

“…This paper reviews the use of discrete particle models (DPMs) for the study of the flow phenomena prevailing in fluidized beds. DPMs describe the gas-phase as…”
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Development of an image measurement technique for size distribution in dense bubbly flows by Lau, Y.M., Deen, N.G., Kuipers, J.A.M.

“…Present work describes the development of a non-intrusive image analysis technique to measure the bubble size distribution in bubbly flows. Generally image…”
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A sharp-interface Immersed Boundary Method to simulate convective and conjugate heat transfer through highly complex periodic porous structures by Das, Saurish, Panda, A., Deen, N.G., Kuipers, J.A.M.

“…[Display omitted] •A versatile immersed boundary method for highly complex porous structures.•Conjugate heat transfer and Neumann boundary condition for…”
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Scale-Adaptive Simulation of a square cross-sectional bubble column by Ma, T., Lucas, D., Ziegenhein, T., Fröhlich, J., Deen, N.G.

“…This paper presents detailed Euler–Euler Scale-Adaptive Simulations of the dispersed bubbly flow in a square cross-sectioned bubble column. The main objective…”
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Direct numerical simulation of effective drag in dense gas–liquid–solid three-phase flows by Baltussen, M.W., Kuipers, J.A.M., Deen, N.G.

“…Gas–liquid–solid three phase flows are commonly found in (bio-)chemical processes, e.g. in bubble slurry columns in the Fischer–Tropsch process. In order to…”
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Numerical simulation of the dynamic flow behavior in a bubble column: A study of closures for turbulence and interface forces by Zhang, D., Deen, N.G., Kuipers, J.A.M.

“…Numerical simulations of the bubbly flow in two square cross-sectioned bubble columns were conducted with the commercial CFD package CFX-4.4. The effect of the…”
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Direct numerical simulations and experiments of a pseudo-2D gas-fluidized bed by Tang, Y., Lau, Y.M., Deen, N.G., Peters, E.A.J.F., Kuipers, J.A.M.

“…This paper reports our study on fluidization of 5000 spherical particles in a pseudo-2D gas-fluidized bed by direct numerical simulations (DNS) and experiments…”
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On the drag force of bubbles in bubble swarms at intermediate and high Reynolds numbers by Roghair, I., Lau, Y.M., Deen, N.G., Slagter, H.M., Baltussen, M.W., Van Sint Annaland, M., Kuipers, J.A.M.

“…An accurate and fast simulation of large-scale gas/liquid contact apparatusses, such as bubble columns, is essential for the optimization and further…”
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Experimental and simulation study of heat transfer in fluidized beds with heat production by Li, Z., Janssen, T.C.E., Buist, K.A., Deen, N.G., van Sint Annaland, M., Kuipers, J.A.M.

“…•Heat production in a fluidized bed by CO2 adsorption on Zeolite 13X.•Combined infrared/visual camera (PIV-DIA-IR) technique for studying heat…”
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Numerical study of bubble break-up in bubbly flows using a deterministic Euler–Lagrange framework by Lau, Y.M., Bai, W., Deen, N.G., Kuipers, J.A.M.

“…In this work we present a numerical model to predict the bubble size distribution in turbulent bubbly flows. The continuous phase is described by the…”
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A numerical study of cutting bubbles with a wire mesh by Baltussen, M.W., Kuipers, J.A.M., Deen, N.G.

“…•A novel combined Volume of Fluid Immersed Boundary method is presented.•The combined method is used to numerically study bubble cutting by a wire…”
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A critical comparison of surface tension models for the volume of fluid method by Baltussen, M.W., Kuipers, J.A.M., Deen, N.G.

“…In many different fields of research, the interactions between two immiscible fluids are of importance. To study these flows in industrial equipment, a…”
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Experimental study on orientation and de-mixing phenomena of elongated particles in gas-fluidized beds by Boer, L., Buist, K.A., Deen, N.G., Padding, J.T., Kuipers, J.A.M.

“…In this experimental study the segregation behavior for fluidized mixtures of spherical and cylindrical particles is investigated. In industry, fluidization of…”
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Effect of superficial gas velocity on the particle temperature distribution in a fluidized bed with heat production by Li, Z., van Sint Annaland, M., Kuipers, J.A.M., Deen, N.G.

“…The heat transfer behavior of particles and gas in an olefin polymerization fluidized bed was numerically analyzed using an in-house developed 3-D…”
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Coefficient of restitution for particles impacting on wet surfaces： An improved experimental approach by Cruegera, B, Salikova, V, Heinricha, S, Antonyukb, S, Sutkarc, V S, Deenc, NG, Kuipersc, JAM

“…The coefficient of restitution is widely used to characterize the energy dissipation rate in numerical simulations involving particle collisions. The challenge…”
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Experimental study of the bubble size distribution in a pseudo-2D bubble column by Lau, Y.M., Sujatha, K. Thiruvalluvan, Gaeini, M., Deen, N.G., Kuipers, J.A.M.

“…This work presents an experimental study of the bubble size distribution of a bubbly flow using digital image analysis (DIA). In order to facilitate the image…”
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