@conference {361, title = {Design and Simulation of flow field for sinusoidal scaffold using Computational fluid dynamics}, booktitle = {XXIX Congress of International/Japanese Society of Biomechanics}, year = {2023}, month = {08/2023}, publisher = {International Society of Biomechanics}, organization = {International Society of Biomechanics}, abstract = {

Bone can heal small defects by itself but fails to do so in case of severe bone damage. A common treatment for severe damage is grafting bone. Approximately 1.6 million bone grafts are performed in the United States per year [1]. Unfortunately, this treatment has several serious drawbacks, such as a high risk of infections or even donor site morbidities. Tissue Engineering and regenerative medicine is a promising biomedical alternative to cure severe bone damage. Scaffolds can be used to re-build the bone structure since they can support seeded cells and provide an optimal environment for cell growth [2]. The scaffold{\textquoteright}s geometry design influences flow characteristics, mass transfer rates, and wall shear stress (WSS). The WSS is an important parameter to investigate because it affects the differentiation and bioactivity of cells inside the scaffold. In this work, we investigate the influence of the scaffold geometry on the flow field, WSS and mass transport using computational fluid dynamics (CFD). The reliability of the numerical results is evaluated using the μ-particle image velocimetry (PIV) method.

}, keywords = {3D printing, CFD, OpenFOAM, Scaffold geometry, scaffolds, Wall shear stress}, author = {Theresia Baumgartner and Markus B{\"o}senhofer and Olivier Guillaume and Aleksandr Ovsianikov and Michael Harasek and Margit Gf{\"o}hler} } @article {358, title = {Development of a computer vision-based measuring system for investigating the porous media structure}, journal = {Materials Characterization}, volume = {203}, year = {2023}, month = {Jan-09-2023}, pages = {113087}, issn = {10445803}, doi = {10.1016/j.matchar.2023.113087}, url = {https://doi.org/10.1016/j.matchar.2023.113087}, author = {Ruzova, Т.А. and Haddadi, B. and Jonach, T. and Jordan, C. and Harasek, M.} } @article {328, title = {Dataset for the Heat-Up and Heat Transfer towards Single Particles and Synthetic Particle Clusters from Particle-Resolved CFD Simulations}, journal = {Data}, volume = {7}, year = {2022}, month = {Jan-02-2022}, pages = {23}, doi = {10.3390/data7020023}, url = {https://www.mdpi.com/2306-5729/7/2/23https://www.mdpi.com/2306-5729/7/2/23/pdf}, author = {Pichler, Mario and B{\"o}senhofer, Markus and Harasek, Michael} } @article {315, title = {Dataset for the simulated biomass pyrolysis in rotary kilns with varying particle residence time distributions}, journal = {Data in Brief}, volume = {39}, year = {2021}, month = {Jan-12-2021}, pages = {107603}, abstract = {

Slow pyrolysis of biomass is commonly performed in rotary kilns. The effect of the particle residence time distribution on biomass conversion is often neglected when numerically modeling such systems. But this effect might be significant under certain conditions. The data presented here are results of numerical simulation of the biomass pyrolysis in rotary kilns under numerous operating conditions and levels of axial dispersion of biomass particles. The varied operating conditions are the kiln diameter (D=0.1{\textendash}1\ m), the ratio of particle to kiln diameter (d/D=5{\texttimes}10-3{\textendash}40{\texttimes}10-3), the ratio of kiln length to kiln diameter (L/D=1{\textendash}10), the kiln{\textquoteright}s inclination angle (β=0.1{\textendash}8o), the Froude number (Fr=10-3{\textendash}10-2), the rotational Reynolds number (Re=102{\textendash}16{\texttimes}103), and the P{\'e}clet number (Pe=5{\textendash}100). Data of 13,851 single case simulations are provided with this article. This includes the mean particle residence time, gas, bed and kiln wall temperatures, solid and gaseous species mass flows, heat fluxes, and the solid bed height over the kiln length. These comprehensive data have the potential to help in modeling, design, analysis, and optimization of rotary kilns used for the pyrolysis of biomass. The main characterization and interpretation is presented in the related main research paper by Pichler et\ al. (2021)[1].

}, issn = {23523409}, doi = {10.1016/j.dib.2021.107603}, url = {https://doi.org/10.1016/j.dib.2021.107603}, author = {Pichler, Mario and Haddadi, Bahram and Jordan, Christian and Norouzi, Hamidreza and Harasek, Michael} } @article {302, title = {Design and Simulation of Gas Burner Ejectors}, journal = {Carbon Resources Conversion}, year = {2021}, month = {Jan-01-2021}, issn = {25889133}, doi = {10.1016/j.crcon.2021.01.006}, url = {10.1016/j.crcon.2021.01.006}, author = {Pichler, Mario and Wesenauer, Florian and Jordan, Christian and Puskas, Stefan and Streibl, Bernhard and Winter, Franz and Harasek, Michael} } @proceedings {262, title = {Design of Control Strategies for the CO2 Removal from Blood with an Intracorporeal Membrane Device}, year = {2018}, publisher = {BMEiCON 2018}, address = {Chiang Mai, Thailand}, author = {Harasek, Michael and Elenkov, Martin and Lukitsch, Benjamin and Ecker, Paul and Janeczek, Christoph and Gf{\"o}hler, Margit} } @conference {240, title = {Difficulties in the characterization of gas phase combustion regimes}, booktitle = {13th Minisymposium Chemical and Process Engineering}, year = {2017}, author = {B{\"o}senhofer, Markus and Jordan, Christian and Harasek, Michael} } @article {39, title = {Designing Better Membrane Modules Using CFD}, journal = {Chemical Product and Process Modeling}, volume = {11}, year = {2016}, pages = {57{\textendash}66}, doi = {10.1515/cppm-2015-0066}, author = {Haddadi, Bahram and Jordan, Christian and Schretter, Philipp and Lassmann, Tino and Harasek, Michael} } @conference {56, title = {Designing Better Membrane Modules Using CFD}, booktitle = {Proceeding Book}, year = {2015}, author = {Haddadi, Bahram and Jordan, Christian and Schretter, Philipp and Lassmann, Tino and Harasek, Michael} } @article {151, title = {Determination of mixing quality in biogas plant digesters using tracer tests and computational fluid dynamics}, journal = {Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis}, volume = {140}, year = {2013}, pages = {1269{\textendash}1278}, doi = {10.11118/actaun201361051269}, author = {Kamarad, Ludek and Pohn, Stefan and Bochmann, G{\"u}nther and Harasek, Michael} } @article {48, title = {Development of Agitation Systems in Biogas Plants : Investigation of Mixing Characteristics, Improvement of Energy Efficiency and Scale-up using CFD}, journal = {Chemical Engineering Transactions}, volume = {21}, year = {2010}, pages = {1195{\textendash}1200}, doi = {10.3303/CET1021200}, author = {Maier, Christian and Weichselbaum, Wolfgang and Schlerka, Martin and Harasek, Michael} } @article {20, title = {Design, simulation and application of a new micromixing device for time resolved infrared spectroscopy of chemical reactions in solution}, journal = {Lab on a Chip}, volume = {1}, year = {2001}, pages = {16{\textendash}21}, abstract = {

We present a novel micromachined fast diffusion based mixing unit for the study of rapid chemical reactions in solution with stopped-flow time resolved Fourier transform infrared spectroscopy (TR-FTIR). The presented approach is based on a chip for achieving lamination of two liquid sheets of 10 μm thickness and \~{}1 mm width on top of each other and operation in the stopped-flow mode. The microstructure is made on infrared transmitting calcium fluoride discs and built up with two epoxy negative photoresist layers and one silver layer in between. Due to the highly laminar flow conditions and the short residence time in the mixer there is hardly any mixing when the two liquid streamlines pass through the mixing unit, which allows one to record a mid-IR transmission spectrum of the analytes prior to reaction. When the flow is stopped, the reactant streams are arrested in the flow-cell and rapidly mixed by diffusion due to the reduced interstream distances and the reaction can be directly followed with hardly any dead time. On the basis of two model reactions{\textemdash}neutralisation of acetic acid with sodium hydroxide as well as saponification of methyl monochloroacetate{\textemdash}the performance of the mixing device was tested revealing proper functioning of the device with a time for complete mixing of less than 100 ms. The experimental results were supported by numerical simulations using computational fluid dynamics (CFD), which allowed a reliable, quantitative analysis of concentration, pressure and flow profiles in the course of the mixing process.

}, doi = {http://dx.doi.org/10.1039/b104391a}, author = {Hinsmann, Peter and Frank, Johannes and Svasek, Peter and Harasek, Michael and Lendl, Bernhard} }