Fakulta strojního inženýrství
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Energetický ústav [39]
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Recent Submissions
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Influence of partial immersion on steel plate dynamic properties
(EDP Sciences, 2019-06-28)Eigenfrequency of object drops when it is submerged in the water compared to an air exposition. In this article the effect of partial submersion on dynamic properties of steel plate is investigated. Changes differ by a ... -
The effect of surface grooves on film breakdowns in point contacts
(Elsevier, 2016-10-01)Surface roughness plays an important role in transition from full to mixed elastohydrodynamic regime. One kind of features appearing on a real rough surface are grooves longer than contact diameter. It has already been ... -
Straddled numbers: numbers equal to the sum of powers of consecutive primes from the least prime factor to the largest prime factor
(Bulgarian Academy of Sciences, 2019-07-02)Positive integers equal to the sum of powers of consecutive primes from the least prime factor to the largest prime factor are studied. They are called the straddled numbers and their properties are derived. There are also ... -
CFD Simulation of Defogging Effectivity in Automotive Headlamp
(MDPI, 2019-07-01)In the past decade, the condensation of internal air humidity in automotive headlamps has become more prevalent than ever due to the increased usage of a new light source—LEDs. LEDs emit far less heat than previously-used ... -
Laminar-turbulent transition in a constricted tube: Comparison of Reynolds-averaged Navier–Stokes turbulence models and large eddy simulation with experiments
(SAGE Journals, 2019-05-27)Constricted tubes appear in many engineering as well as biological systems such as blood vessels or pulmonary airways. The aim of this article is to test the ability of different turbulence models to predict the flow field ... -
Sunflower Plants as Bioindicators of Environmental Pollution with Lead (II) Ions
(MDPI, 2009-06-25)In this study, the influence of lead (II) ions on sunflower growth and biochemistry was investigated from various points of view. Sunflower plants were treated with 0, 10, 50, 100 and/or 500 mu M Pb-EDTA for eight days. ... -
Condenser-type Heat Exchanger for Compost Heat Recovery Systems
(MDPI, 2019-04-25)The majority of heat released during composting is contained in latent form of water vapour. To improve the rate of heat recovery, a simple heat exchanger based on condensation of compost vapours was designed. A prototype ... -
Automatic assessment of the cardiomyocyte development stages from confocal microscopy images using deep convolutional networks
(PLOS, 2019-05-30)Computer assisted image acquisition techniques, including confocal microscopy, require efficient tools for an automatic sorting of vast amount of generated image data. The complexity of the classification process, absence ... -
Improving performance of simplified computational fluid dynamics models via symmetric successive overrelaxation
(MDPI, 2019-06-25)The ability to model fluid flow and heat transfer in process equipment (e.g., shell-and-tube heat exchangers) is often critical. What is more, many different geometric variants may need to be evaluated during the design ... -
Performant and Simple Numerical Modeling of District Heating Pipes with Heat Accumulation
(MDPI, 2019-02-16)This paper compares approaches for accurate numerical modeling of transients in the pipe element of district heating systems. The distribution grid itself affects the heat flow dynamics of a district heating network, which ... -
Utilization of an Air-PCM Heat Exchanger in Passive Cooling of Buildings: A Simulation Study on the Energy Saving Potential in Different European Climates
(MDPI, 2019-03-22)The energy saving potential (ESP) of passive cooling of buildings with the use of an air-PCM heat exchanger (cold storage unit) was investigated through numerical simulations. One of the goals of the study was to identify ... -
Comparison of the energy conversion efficiency of a solar chimney and a solar PV-powered fan for ventilation applications
(MDPI, 2018-04-12)A study into the performance of a solar chimney and a solar photovoltaic (PV)-powered fan for ventilation applications was carried out using numerical simulations. The performance of the solar chimney was compared with ... -
Particulate Matter Produced by Micro-Scale Biomass Combustion in an Oxygen-Lean Atmosphere
(MDPI, 2018-12-01)This article extends earlier research by the authors that was devoted to the experimental evaluation of ultra-fine particles produced by the laboratory combustion of beechwood samples. These particles can have severe ... -
Geometric-Phase Microscopy for Quantitative Phase Imaging of Isotropic, Birefringent and Space-Variant Polarization Samples
(Springer Nature, 2019-03-05)We present geometric-phase microscopy allowing a multipurpose quantitative phase imaging in which the ground-truth phase is restored by quantifying the phase retardance. The method uses broadband spatially incoherent light ... -
Nitrogen Interstitial Alloying of CoCrFeMnNi High Entropy Alloy through Reactive Powder Milling
(MDPI, 2019-04-04)The present work is focused on the synthesis of CoCrFeMnNi high entropy alloy (HEA) interstitially alloyed with nitrogen via powder metallurgy routes. Using a simple method, nitrogen was introduced to the HEA from the ... -
Low temperature a/b nanotwins in Ni50Mn25+xGa25x Heusler alloys
(Springer Nature, 2018-08-09)We have found low temperature a/b nanotwins having (110) twinning plane in a five-layered modulated martensite phase of Ni50Mn25+xGa25x (at. %) Heusler alloys and identified the particular region in phase diagram where ... -
Transformation Paths from Cubic to Low-Symmetry Structures in Heusler Ni2MnGa Compound
(Springer Nature, 2018-05-08)In order to explain the formation of low-temperature phases in stoichiometric Ni2MnGa magnetic shape memory alloy, we investigate the phase transformation paths from cubic austenite with Heusler structure to low-symmetry ... -
Stable room-temperature ferromagnetic phase at the FeRh(100) surface
(Springer Nature, 2016-03-03)Interfaces and low dimensionality are sources of strong modifications of electronic, structural, and magnetic properties of materials. FeRh alloys are an excellent example because of the first-order phase transition taking ... -
Automated calibration of advanced cyclic plasticity model parameters with sensitivity analysis for aluminium alloy 2024-T351
(SAGE Publications, 2019-03-18)The plasticity models in finite element codes are often not able to describe the cyclic plasticity phenomena satisfactorily. Developing a user-defined material model is a demanding process, challenging especially for ... -
On elliptic curves with a closed component passing through a hexagon
(Ovidius University, 2019-06-01)In general, there exists an ellipse passing through the vertices of a convex pentagon, but there is no ellipse passing through the vertices of a convex hexagon. Thus, attention is turned to algebraic curves of the third ...
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