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van den Akker, H.E.A. (author), Mudde, R.F. (author)De transport- en overdrachtsprocessen van warmte, massa en impuls worden naar hun analogie behandeld. De processen worden beschreven met behulp van macro- en microbalansen die in veel gevallen leiden tot differentiaalvergelijkingen. Ook veel aspecten van stromingsleer komen op deze manier aan de orde en zo bereidt het boek ook voor op moderne...book 2023
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van den Akker, H.E.A. (author), Mudde, R.F. (author), Stammers, Ed (author)Deze vraagstukkenbundel is bedoeld als oefenmateriaal bij het bestuderen van de basiscolleges Fysische Transportverschijnselen, zoals die aan de TU Delft worden gegeven. De vraagstukken zijn afkomstig uit oude vraagstukkenbundels en uit recente tentamens. Wij hebben de formulering van veel van deze vraagstukken herzien.<br/><br/>Vooral door de...book 2023
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Mandalahalli, M.M. (author), Lif, Johan (author), Mudde, R.F. (author), Portela, L. (author)In this work, the rise characteristics of a single H<sub>2</sub> bubble, in the ellipsoidal regime, in (i) water, (ii) single electrolyte (2 M, 4.5 M NaCl) solution and (iii) various concentrations of electrolyte mixture (up to 6.4 M of 1:5 weight fraction NaCl-NaClO<sub>3</sub>), have been studied, at temperatures up to 80°C. Our results...journal article 2023
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van Leersum, N.K. (author), van Valkenburg, W.F. (author), Mudde, R.F. (author)Het permanent najagen van kennis en vaardigheden voor onze persoonlijke en professionele ontwikkeling zal ons steeds meer veranderen in levenslang lerenden. Maar wat houdt 'een leven lang ontwikkelen' precies in, en welke rol kunnen universiteiten daarin spelen?journal article 2021
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Sousa Pires da Costa Basto, R.M. (author), Jiménez, M. (author), Mudde, R.F. (author), van der Wielen, L.A.M. (author), Cuellar Soares, M.C. (author)Emulsion formation is a major concern when dealing with multiphasic fermentations. Flocculants can be used together with other demulsification techniques to improve oil recovery in multiphasic fermentations. In this paper, the impact of adding flocculants during a multiphasic fermentation with 10 wt% dodecane, to destabilize the broth...journal article 2020
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Ma, Jiliang (author), van Ommen, J.R. (author), Liu, Daoyin (author), Mudde, R.F. (author), Chen, Xiaoping (author), Wagner, E.C. (author), Liang, Cai (author)Due to the presence of inter-particle cohesive force, cohesive particles reveal totally different fluidization behaviors as compared to the non-cohesive system. This paper studies the fluidization dynamics of Geldart B particles with varying thermal-induced cohesive forces. Multi-source X-ray tomography was applied to reconstruct 3D temporal...journal article 2019
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Wei, P. (author), Mudde, R.F. (author), Uijttewaal, W.S.J. (author), Spanjers, H. (author), van Lier, J.B. (author), de Kreuk, M.K. (author)This study aimed to characterise the gas-liquid flow and mixing behaviour in a gas-mixed anaerobic digester by improving phase interaction modelling using Computational Fluid Dynamics (CFD). A 2D axisymmetric model validated with experimental data was set up using an Eulerian-Eulerian method. Uncertainty factors, including bubble size, phase...journal article 2019
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Ma, Jiliang (author), van Ommen, J.R. (author), Liu, Daoyin (author), Mudde, R.F. (author), Chen, Xiaoping (author), Pan, Suyang (author), Liang, Cai (author)The increase of inter-particle cohesive force greatly changes the fluidization dynamics, finally leading to the partial or complete failure of fluidization. However, few studies concern such transition process. This paper investigates the fluidization dynamics of Geldart B particles with a wide-range of cohesive force by analyzing the in-bed...journal article 2019
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Jahangir, S. (author), Wagner, E.C. (author), Mudde, R.F. (author), Poelma, C. (author)Cavitation is a complicated multiphase phenomenon, where the production of vapor cavities leads to an opaque flow. Exploring the internal structures of the cavitating flows is one of the most significant challenges in this field of study. While it is not possible to visualize the interior of the cavity with visible light, we use X-ray...journal article 2019
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Sousa Pires da Costa Basto, R.M. (author), Casals Peralvarez, M. (author), Mudde, R.F. (author), van der Wielen, L.A.M. (author), Cuellar Soares, M.C. (author)Multiphasic fermentations where an organic phase is spontaneously formed or when it is added for product removal are commonly used for production of valuable compounds. The turbulent conditions and the presence of surface-active compounds (SACs) during fermentation create a stable emulsion difficult to separate. A gas bubble/oil droplet...journal article 2019
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Mandalahalli, M.M. (author), Wagner, E.C. (author), Portela, L. (author), Mudde, R.F. (author)In this work, the effect of an electrolyte (up to 2 M of NaCl dissolved in water) on a homogeneous dense bubbly flow, in an airlift bubble column, is studied using nonintrusive techniques. X-ray and high-speed imaging are used to investigate the bubble size distribution, the local and the global gas-fraction profiles. The major effect of the...journal article 2019
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Lutz, S.R. (author), Popp, Andrea (author), van Emmerik, T.H.M. (author), Gleeson, Tom (author), Kalaugher, Liz (author), Möbius, Karsten (author), Mudde, Tonie (author), Walton, Brett (author), Hut, R.W. (author), Savenije, Hubert (author), Slater, Louise J. (author), Solcerova, A. (author), Stoof, Cathelijne R. (author), Zink, Matthias (author)Media such as television, newspapers and social media play a key role in the communication between scientists and the general public. Communicating your science via the media can be positive and rewarding by providing the inherent joy of sharing your knowledge with a broader audience, promoting science as a fundamental part of culture and...journal article 2018
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Jahangir, S. (author), Wagner, E.C. (author), Mudde, R.F. (author), Poelma, C. (author)Cavitation is a complex multiphase phenomenon, where the production of vapor bubbles leads to opaqueness of the flow. While it is nearly impossible to visualize the interior of the cavitation region with visible light, we show that with X-ray computed tomography it is possible to obtain the time-averaged void fraction distribution in an...conference paper 2018
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Haringa, C. (author), Tang, W. (author), Wang, G. (author), Deshmukh, A.T. (author), van Winden, Wouter A. (author), Chu, Ju (author), van Gulik, W.M. (author), Heijnen, J.J. (author), Mudde, R.F. (author), Noorman, H.J. (author)We assess the effect of substrate heterogeneity on the metabolic response of P. chrysogenum in industrial bioreactors via the coupling of a 9-pool metabolic model with Euler-Lagrange CFD simulations. In this work, we outline how this coupled hydrodynamic-metabolic modeling can be utilized in 5 steps. (1) A model response study with a fixed...journal article 2018
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Haringa, C. (author), Vandewijer, Ruben (author), Mudde, R.F. (author)Steady state multiple reference frame-RANS (MRF-RANS) simulations frequently show strong over-predictions of the mixing time in single-phase, multi-impeller mixing tanks, which is sometimes patched by ad hoc tuning of the turbulent Schmidt-number. In Part I of this work, we experimentally revealed the presence of macro-instabilities in the...journal article 2018
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Schillinger, F. (author), Schildhauer, TJ (author), Maurer, S. (author), Wagner, E.C. (author), Mudde, R.F. (author), van Ommen, J.R. (author)The performance of fluidized bed reactors strongly depends on the bubble behavior, for which reason knowledge concerning the bubble properties is important for modeling and reactor optimization. X-ray measurements can be used to characterize bubbles within the cross-section of a fluidized bed on a laboratory scale, but cannot easily be...journal article 2018
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Haringa, C. (author), Vandewijer, Ruben (author), Mudde, R.F. (author)CFD simulations of mixing in single-phase multi-Rushton stirred tanks based on the RANS methodology frequently show an over-prediction of the mixing time. This hints at an under-prediction of the mass exchange between the compartments formed around the individual impellers. Some studies recommend tuning the turbulent Schmidt number to address...journal article 2018
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Haringa, C. (author), Mudde, R.F. (author), Noorman, H.J. (author)Euler–Lagrange computational fluid dynamics simulations offer great potential for the integration of transport dynamics and metabolic dynamics in fermentation systems. Since the seminal work of Lapin et al. [1,2], progress has been made, mainly in the analysis of CFD data and translation to laboratory setup designs. Different large-scale...journal article 2018
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Helmi, A. (author), Wagner, E.C. (author), Gallucci, F. (author), Van Sint Annaland, Martin (author), van Ommen, J.R. (author), Mudde, R.F. (author)The application of membrane assisted fluidized bed reactors for distributed energy production has generated considerable research interest during the past few years. It is widely accepted that, due to better heat and mass transfer characteristics inside fluidized bed reactors, the reactor efficiency can outperform other reactor configurations...journal article 2017
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Delvigne, Frank (author), Takors, Ralf (author), Mudde, R.F. (author), van Gulik, W.M. (author), Noorman, H.J. (author)Efficient optimization of microbial processes is a critical issue for achieving a number of sustainable development goals, considering the impact of microbial biotechnology in agrofood, environment, biopharmaceutical and chemical industries. Many of these applications require scale-up after proof of concept. However, the behaviour of...journal article 2017
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