Hubertus Milke, Prof.

For those wind-tunnel folks interested in measuring wall shear stress in low-speed, separating and reattaching flows, I highly recommend these new little sensors 😀 https://lnkd.in/eUn_Y8NY

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🚀#TitleStory Casimir–Lifshitz Frictional Heating in a System of Parallel Metallic Plates | Article by George V. Dedkov MDPI Kabardino Balkarian State University #Casimir #Lifshitz #friction #force #quantum #radiative #heating #physics This article belongs to the Special Issue: 75 Years of the Casimir Effect: Advances and Prospects https://lnkd.in/gmnPP8Bd #Abstract The Casimir–Lifshitz force of friction between neutral bodies in relative motion, along with the drag effect, causes their heating. This paper considers this frictional heating in a system of two metal plates within the framework of fluctuation electromagnetic theory. Analytical expressions for the friction force in the limiting cases of low (zero) temperature and low and high speeds, as well as general expressions describing the kinetics of heating, have been obtained. It is shown that the combination of low temperatures (T < 10 K) and velocities of 10–103 m/s provides the most favorable conditions when measuring the Casimir–Lifshitz friction force from heat measurements. In particular, the friction force of two coaxial disks of gold 10 cm in diameter and 500 nm in thickness, one of which rotates at a frequency of 10–103 rps (revolutions per second), can be measured using the heating effect of 1–2 K in less than 1 min. A possible experimental layout is discussed.

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Isostasy-I: https://lnkd.in/dD25MX7X Stress and strain issues in structural geology, NPTEL lecture series

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Micrography involves scrutinizing the microstructure of materials, including welds, at an extreme level of magnification. 🔎 Read the full article at ESAB University https://ow.ly/OP4x50RXILT

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Isostasy-II: https://lnkd.in/dGQH5W2i Stress and strain issues in structural geology, NPTEL lecture series

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#mdpimetals #highlycited 📌Highly cited paper sharing: Title: Structural Materials Durability Statistical Assessment Taking into Account Threshold Sensitivity by Žilvinas Bazaras, Vaidas Lukoševičius and Eglė Bazaraitė   The full text of the paper can be viewed and downloaded for free at https://lnkd.in/gdjJeHE6 #metalfatigue #structuralmaterials

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Structural analysis and optimization of gravity-driven membrane (GDM) for water treatment using computational fluid dynamics (CFD) with open slot implementation https://lnkd.in/gUNQwKme

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If you are new to #ComputedTomography (#CT) or you need to teach it to someone, this webinar makes a great starting point. While this webinar focusses on materials science, the principles can be applied to almost any type of specimens. Watch now 👉 https://bit.ly/4ewZUuo #xrayCT #microCT

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Multi-disciplinary approach research is the best tool required to solve water and environmental problems. There is always something to learn from colleagues with complimentary skills. Our paper merged machine learning, statistics, remote sensing technology, GIS and modelling for water quality monitoring and management.

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https://lnkd.in/dcqgXed An efficient enantio- and chemoselective copper hydride catalyzed semireduction of conjugated enynes

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📢 Call for Papers: Energy Efficiency and Sustainability in Construction and Building Materials This Special Issue is edited by Dr. Mohammad H Baghban and Dr. Davoud Tavakoli, from Norwegian University of Science and Technology (NTNU) and KU Leuven The selected articles and studies within this Special Issue highlight recent research and developments in energy-efficient building design, showcasing the potential of phase change materials (PCMs), proper thermal insulation, and innovative building envelope design to optimize thermal performance and reduce energy consumption. Furthermore, the importance of sustainable building materials derived from renewable sources, recycled materials, and low-carbon alternatives are also emphasized in this Special Issue. 📆 Deadline for manuscript submissions: 10 December 2024 If you are interested or have any questions, please comment below or email our editor Mr. Sebastian Ma at <sebastian.ma@mdpi.com>. 🔗 More details can be found at: https://lnkd.in/dn8wbs3e

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OPEN ACCESS of a significant paper entitled: "The effects of curing time and temperature on stiffness, strength and durability of sand-environment friendly binder blends" published at SOILS AND FOUNDATIONS 59, pp. 1428-1439 by Professor Professor Nilo Consoli (PPGEC UFRGS), Dr. Helena Leon, Dr. Mariana Carretta, Eng. João Victor Linch Daronco, CNPI and Dr. David Eduardo Lourenço!!! Federal University of Rio Grande do Sul Agricultural-industrial wastes, like rice-husk ash (RHA) and carbide lime (CL), have great potential applications in such earthworks as the stabilization of slopes and pavement layers and the spread footings and bed of pipelines, particularly in the regions near where the waste is produced. Present research evaluates the potential use of RHA mixed with CL as a binder, improving strength, stiffness and durability properties of a uniform sand. Two different curing temperatures, 23 and 40 degrees Celsius, and curing periods, 7 and 28 days, of compacted sand-RHA-CL blends (distinct dry unit weights and contents of RHA and CL) were evaluated to determine the importance of these changes on the reactions between the materials. The experimental program aims to assess the following parameters: initial shear modulus (Go), unconfined compressive strength (qu), and accumulated loss of mass (ALM). Studies have been carried out to quantify these parameters as a function of a novel index called porosity/volumetric binder content (n/Biv). The results showed higher values of Go and qu, as well as a small rate of ALM with reduction of porosity and with rise of the environment friendly binder content. The latter is achieved either by increasing either the RHA or the CL content. The curing temperature acts as a catalyzer, accelerating the pozzolanic reactions between RHA and CL. Longer curing periods also benefit reactions between materials by enhancing their geotechnical properties. An analysis of variance (ANOVA) was carried, and the results showed the dry unit weight, RHA content and curing type are significantly affect the strength results. It was also possible to verify that curing for 28 days at 23 degrees Celsius and for 7 days at 40 degrees Celsius are statistically equivalent in terms of strength. The Go results after weathering cycles tended to decrease in specimens at a 40 degrees Celsius curing temperature and increase in specimens at a 23 degrees Celsius curing temperature!!!

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Physical simulation of the interaction of salt and fresh water in the Water Research Institute with the cooperation of friends in the Hydraulic Research Institute. Physical simulation and assessment of the intrusion equation with the SEAWAT numerical model were analyzed and the coefficients of solute transport were calculated for the north of Iran.

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💧 The outcome summary and proceedings of the 10th IAHR Symposium on Hydraulic Structures are now available! https://lnkd.in/dnyCzjkk 🌍 The Symposium took place at ETH Zürich, Switzerland, from June 17 to 19, 2024, and brought together 185 experts and young professionals from 27 different countries. 📄 89 technical papers on diverse and novel aspects of hydraulic structures have been published in the proceeding of the symposium. In total, four keynote lectures, one award winner lecture, 72 oral presentations and 13 poster presentations were given. 🏅 Additionally, six papers out of 27 papers were selected for the Philip H. Burgi Best Paper Award. ⚡️ Dive into the dangers than can emanate from water such as flooding and its valuable contributions to the energy transition via #hydropower generation in the Proceedings of the 10th International Symposium on Hydraulic Structures. 🆓 DOWNLOAD the proceedings for FREE! https://lnkd.in/dk47pbjX Robert Boes ismail albayrak ismail A. Stefan Felder Brian Crookston Dr Valentin Heller Sean Mulligan, Ph.D José María Carrillo Sánchez Elena Pummer Daniel Valero Zulfequar Ahmad #IAHR #HydroEnvironment #iahrHydraulicStructures #EnergyTransition #Research #nature #engineeringstudent #innovation #civilengineering #sustainability #environment #science #WaterEngineering

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📰 CIMNE's Dr. Alfonso Rodríguez Dono, Dr. Sebastia Olivella (Geomechanics and Hydrogeology Cluster), and Yunfeng Zhou (UPC) have developed a novel approach to simulate gas flow through Callovo-Oxfordian claystone (COx) 🔗 https://lnkd.in/dfiV9GdF The study successfully simulates a long-term gas injection test using CODE_BRIGHT, a Finite Element Method (FEM) software developed at the Universitat Politècnica de Catalunya for performing coupled thermo-hydro-mechanical (THM) analysis in geological media. 👀 AT A GLANCE ✔️ Heterogeneity & Anisotropy: Authors generated a spatially correlated field of porosity, with material properties defined as functions of porosity. This led to realistic heterogeneity and anisotropy. ✔️ Permeability Dynamics: The study considers intrinsic permeability changes due to induced deformations, which improves model accuracy. ✔️ Sensitivity Analysis: Experts conducted various analyses to understand mechanisms of gas migration, which highlighted the model's robustness. ✔️ Embedded Fracture Model: This model effectively captures significant changes in permeability due to gas pressure-induced deformations. ✨ WHY IT MATTERS This research marks a significant advancement in the field of geomechanics and hydrogeology by offering a new method to simulate gas flow through Callovo-Oxfordian claystone (COx). The innovative methodology incorporates spatially correlated heterogeneity and anisotropy, which are critical for accurately predicting gas migration patterns. ☢️🛡️ This has profound implications for safety assessments in nuclear waste disposal and other subsurface engineering applications. This paper is part of the CODE_BRIGHT Project and the DECOVALEX Project, which focus on advancing the understanding and modelling of coupled thermo-hydro-mechanical-chemical processes in geological media. 📄 The paper, titled “A spatially correlated heterogeneous anisotropic model for simulation of gas flow in Callovo-Oxfordian claystone”, has been published at Computers and Geotechnics. #CIMNE #Research #Geomechanics #Hydrogeology #COx #CODE_BRIGHT #DECOVALEX #CivilEngineering #Innovation #NuclearWasteDisposal #GasFlowSimulation

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Check out the new Bachelor and Master theses topics available at the chair #tum_hydrogeo on our website Bachelor theses: https://lnkd.in/d2HqMYqH Master theses: https://lnkd.in/dcQM5Nxx #groundwater #thesis #hydrgeology #geothermal

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Just published in #Journal of #Fluids and #Structures our latest paper: "Numerical study of the effect of a ridge on the wake and loading of a tidal stream turbine" freely available at https://lnkd.in/dqynRC9r Here we did a systematic analysis of where is best to place a turbine relative to a ridge, a bed feature that is widely found at energetic tidal sites such as #MeyGen. Results are evident: a ridge plays a significant role in the wake recovery downstream of a turbine and it also introduces a source of turbulence (high and low frequency) that impacts turbine loading. You also would not want to place your beloved turbine in the ridge's recirculation!! Excellent paper led by Sulaiman Hurubi, supervised by Tim Stallard, Peter K Stansby and myself in collaboration with Hannah Mullings, MEng PhD CEng MIMechE FHEA. Below is a video of the turbine's wake centre for one of the positions studied. Thanks EPSRC, Supergen Offshore Renewable Energy (ORE) Hub and #UKTC for supporting this research. Of interest to Fraser Johnson, Jeremy Smith, Orbital Marine Power Ltd, Calum Miller, Offshore Renewable Energy Catapult, Offshore Energy - Marine Energy

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