Search results

1

Influence of Liquid Metal Movements on the Casting Creation

100%

Sowa L., Skrzypczak T., Kwiatoń P., Sowa L., Skrzypczak T., Kwiatoń P.

Archives of Metallurgy and Materials

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2021

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vol. 66

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issue 2

2

Analysis of the inadequacy of determining the spectral characteristics of optical fibre periodic structures by way of numerical modelling

100%

Stępniak P., Kisała P., Stępniak P., Kisała P.

Metrology and Measurement Systems

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2020

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vol. 27

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issue 1

3

Mathematical Modeling and Numerical Simulations of Javelin Throw

100%

Maryniak J., Ładyżyńska-Kozdraś E., Golińska E.

Human Movement

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2009

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vol. 10

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issue 1

16-20

EN

A physical model of the human-javelin system has been developed together with a mathematical model of javelin flight including its transverse elastic vibrations. Three kinds of parametric identifications were distinguished: geometrical, mass and aerodynamic. Numerical calculations were made for different initial velocities and throwing angles. The results obtained have been presented graphically.

4

Numerical Analysis Of Mixing Under Low And High Frequency Pulsations At Serpentine Micromixers

100%

Malecha Z. M., Malecha K.

Chemical and Process Engineering

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2014

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vol. 35

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issue 3

369-385

EN

The numerical investigation of the mixing process in complex geometry micromixers, as a function of various inlet conditions and various micromixer vibrations, was performed. The examined devices were two-dimensional (2D) and three-dimensional (3D) types of serpentine micromixers with two inlets. Entering fluids were perturbed with a wide range of the frequency (0 - 50 Hz) of pulsations. Additionally, mixing fluids also entered in the same or opposite phase of pulsations. The performed numerical calculations were 3D to capture the proximity of all the walls, which has a substantial influence on microchannel flow. The geometry of the 3D type serpentine micromixer corresponded to the physically existing device, characterised by excellent mixing properties but also a challenging production process (Malecha et al., 2009). It was shown that low-frequency perturbations could improve the average mixing efficiency of the 2D micromixer by only about 2% and additionally led to a disadvantageously non-uniform mixture quality in time. It was also shown that high-frequency mixing could level these fluctuations and more significantly improve the mixing quality. In the second part of the paper a faster and simplified method of evaluation of mixing quality was introduced. This method was based on calculating the length of the contact interface between mixing fluids. It was used to evaluate the 2D type serpentine micromixer performance under various types of vibrations and under a wide range of vibration frequencies.

5

On the influence of fracture criterion on perforation of high-strength steel plates subjected to armour piercing projectile

89%

Tria D. E., Trębiński R., Tria D. E., Trębiński R.

Archive of Mechanical Engineering

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2015

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vol. 62

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issue 2

6

Design and experimental and numerical verifications of the recirculating blower for long-term tests of turbine flowmeters

89%

Kryłłowicz W., Kuczkowski M., Sobczak K., Kryłłowicz W., Kuczkowski M., Sobczak K.

Archive of Mechanical Engineering

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2014

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vol. 61

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issue 1

7

Focus on development of quality, high pressure die casting process

88%

Peter I., Rosso M.

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issue 1

8

Numerical research of combustion with a minimum boiler load

88%

Hernik B., Zabłocki W., Hernik B., Zabłocki W.

Archives of Thermodynamics

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2020

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vol. 41

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issue 4

9

Frequency of free vibration in systems with power-law restoring force

88%

Grega I., Grega R., Homisin J., Grega I., Grega R., Homisin J.

Bulletin of the Polish Academy of Sciences: Technical Sciences

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2021

10

Numerical Analysis Of Mixing Under Low And High Frequency Pulsations At Serpentine Micromixers

88%

Malecha Z. M., Malecha K.

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issue 3

11

The Hydrodynamic Study of the Swimming Gliding: a Two-Dimensional Computational Fluid Dynamics (CFD) Analysis

75%

Marinho D., Barbosa T., Rouboa A., Silva A.

Journal of Human Kinetics

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2011

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vol. 29

49-57

EN

Nowadays the underwater gliding after the starts and the turns plays a major role in the overall swimming performance. Hence, minimizing hydrodynamic drag during the underwater phases should be a main aim during swimming. Indeed, there are several postures that swimmers can assume during the underwater gliding, although experimental results were not conclusive concerning the best body position to accomplish this aim. Therefore, the purpose of this study was to analyse the effect in hydrodynamic drag forces of using different body positions during gliding through computational fluid dynamics (CFD) methodology. For this purpose, two-dimensional models of the human body in steady flow conditions were studied. Two-dimensional virtual models had been created: (i) a prone position with the arms extended at the front of the body; (ii) a prone position with the arms placed alongside the trunk; (iii) a lateral position with the arms extended at the front and; (iv) a dorsal position with the arms extended at the front. The drag forces were computed between speeds of 1.6 m/s and 2 m/s in a two-dimensional Fluent® analysis. The positions with the arms extended at the front presented lower drag values than the position with the arms aside the trunk. The lateral position was the one in which the drag was lower and seems to be the one that should be adopted during the gliding after starts and turns.

12

On analysis of double-impact test of 1500-kg vehicle into w-beam guardrail system

75%

Wilde K., Bruski D., Burzyński S., Chróścielewski J., Pachocki Ł., Witkowski W., Wilde K., Bruski D., Burzyński S., Chróścielewski J., Pachocki Ł., Witkowski W.

Archives of Civil Engineering

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2021

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vol. 67

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issue 2

Refine search results

Influence of Liquid Metal Movements on the Casting Creation

Analysis of the inadequacy of determining the spectral characteristics of optical fibre periodic structures by way of numerical modelling

Mathematical Modeling and Numerical Simulations of Javelin Throw

Numerical Analysis Of Mixing Under Low And High Frequency Pulsations At Serpentine Micromixers

On the influence of fracture criterion on perforation of high-strength steel plates subjected to armour piercing projectile

Design and experimental and numerical verifications of the recirculating blower for long-term tests of turbine flowmeters

Focus on development of quality, high pressure die casting process

Numerical research of combustion with a minimum boiler load

Frequency of free vibration in systems with power-law restoring force

Numerical Analysis Of Mixing Under Low And High Frequency Pulsations At Serpentine Micromixers

The Hydrodynamic Study of the Swimming Gliding: a Two-Dimensional Computational Fluid Dynamics (CFD) Analysis

On analysis of double-impact test of 1500-kg vehicle into w-beam guardrail system