RM
R.F. Mudde
Authored
15 records found
Euler-Lagrange computational fluid dynamics for (bio)reactor scale down
An analysis of organism lifelines
The trajectories, referred to as lifelines, of individual microorganisms in an industrial scale fermentor under substrate limiting conditions were studied using an Euler-Lagrange computational fluid dynamics approach. The metabolic response to substrate concentration variations a
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Computational fluid dynamics simulation of an industrial P. chrysogenum fermentation with a coupled 9-pool metabolic model
Towards rational scale-down and design optimization
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
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Inter-compartment interaction in multi-impeller mixing
Part I. Experiments and multiple reference frame CFD
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
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Inter-compartment interaction in multi-impeller mixing
Part II. Experiments, sliding mesh and large Eddy simulations
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 exper
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Fluidization dynamics of cohesive Geldart B particles. Part II
Pressure fluctuation analysis
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 partic
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Electrolyte effects on recirculating dense bubbly flow
An experimental study using X-ray imaging
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 loca
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Lagrangian modeling of hydrodynamic–kinetic interactions in (bio)chemical reactors
Practical implementation and setup guidelines
Large substrate concentration gradients can exist in chemical or biochemical reactions, resulting from a large circulation time compared to the turnover time of substrates. The influence of such gradients on the microbial metabolism can significantly compromise optimal bioreactor
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From industrial fermentor to CFD-guided downscaling
What have we learned?
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 tra
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De lerende als rode draad
Weten wat de (werkende) student nodig heeft
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?@en
Fluidization dynamics of cohesive Geldart B particles. Part I
X-ray tomography analysis
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
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Characterising the two-phase flow and mixing performance in a gas-mixed anaerobic digester
Importance for scaled-up applications
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-Eul
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Fysische Transportverschijnselen
Denken in balansen
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 de
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Mass, momentum and energy transport Phenomena
A consistent balances approach: Second edition
A treatment of the transport and transfer processes of heat, mass and momentum in terms of their analogy. The processes are described with the help of macro and micro balances which in many cases lead to differential equations. This way, the textbook also prepares for Computation
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Bioprocess scale-up/down as integrative enabling technology
From fluid mechanics to systems biology and beyond
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 sca
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Onderwijssucces
Van structuur naar cultuur
Eindrapportage van de Evaluatiecommissie Project Studiesucces TU Delft@en
Contributed
5 records found
Through the Organism’s eyes
The interaction between hydrodynamics and metabolic dynamics in industrial-scale fermentation processes
The broth in industrial scale fermentors may contain significant gradients in, for example, substrate concentration, dissolved oxygen and shear rates. From the perspective of microbes in this fermentor, these gradients translate to temporal variations in their environment that ma
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Plastic litter in the ocean
Modeling of the vertical transport of micro plastics in the ocean
Plastic pollution is a big problem all over the world. Every year more plastic is produced, a lot of plastic litter is mismanaged and enters the ocean. It’s important to know where these plastics accumulate. With this information the problem can be quantified and the plastic litt
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Towards an NMR multiphase flowmeter
Method development and performance evaluation for two-phase flow measurements
There is an increasing demand from the petroleum industry for high accuracy subsea multiphase flowmeters to make the development of difficult to access deep water and ultra-deep water fields economically viable. Nuclear Magnetic Resonance (NMR) is a very powerful measuring princi
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In-vitro cardiovascular flow measurements using particle image velocimetry
A patient specific validation study
Dit onderzoek bestudeert het energieverlies van het barotroop getij aan de opwekking van intern getij. Dit energieverlies vindt plaats bij stroming van de gestratificeerde oceaan over steile topografieën, zoals ruggen in de oceaan en bij de randen van continentale platen. Zo'n 25
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