Numerical Modelling and Experimental Testing of Heat Exchangers

2019 ◽  
Author(s):  
Dawid Taler
Keyword(s):  
Numerical Modelling ◽  
Heat Exchangers ◽  
Experimental Testing

scholarly journals Dynamic Response of a Road Bridge Subjected to Passing a Heavy Vehicle over a Standard Irregularity - Numerical Modelling and Experimental Testing

2022 ◽  
Vol 24 (1) ◽  
pp. D37-D45
Author(s):  
Milan Moravčík
Keyword(s):  
Numerical Modelling ◽  
Dynamic Response ◽  
Numerical Simulations ◽  
Experimental Testing ◽  
Heavy Vehicle ◽  
Dynamic Effects ◽  
Actual Problem ◽  
Box Girder ◽  
Dynamic Excitation ◽  
Girder Bridge

The paper presents an analysis of an actual problem related to dynamic effects to road bridges due to travelling a heavy vehicle over the bridge. Numerical simulations of the dynamic response are applied on a fictitious simple beam of the length Lb = 52 m with an artificial irregularity at midspan, corresponding to a characteristic span L (b5) = 52 m of the ten-span continuous box girder bridge. A heavy four-axle truck m v = 32 t is used for dynamic excitation, travelling over the bridge at passing speed of 70km / h. The obtained results are compared to results of the experimentally tested ten-span continuous pre-stressed reinforced concrete girder bridge at the same speed.

scholarly journals Experimental studies and numerical modelling of heat and mass transfer process in shell-and-tube heat exchangers with compact arrangements of tube bundles

2018 ◽  
Vol 240 ◽  
pp. 02006 ◽  
Author(s):  
Valery Gorobets ◽  
Yurii Bohdan ◽  
Viktor Trokhaniak ◽  
Ievgen Antypov
Keyword(s):  
Mass Transfer ◽  
Numerical Modelling ◽  
Heat And Mass Transfer ◽  
Heat Exchangers ◽  
Experimental Studies ◽  
Mass Transfer Process ◽  
Experimental Investigations ◽  
Transfer Processes ◽  
Tube Bundles ◽  
Shell And Tube

Shall-and-tube heat exchangers based on the bundles with in-line or staggered arrangements have been widely used in industry and power engineering. A large number of theoretical and experimental works are devoted to study of hydrodynamic and heat transfer processes in such bundles. In that, works the basic studies of heat and mass transfer for these bundles are found. However, heat exchangers of this type can have big dimensions and mass. One of the ways to improve the weight and dimensions of the shell-and-tube heat exchangers is to use compact arrangement of tube bundles. A new design of heat exchanger is proposed, in which there are no gaps between adjacent tubes that touch each other. Different geometry of these tube bundles with displacement of adjacent tubes in the direction of transverse to the flow is considered. Numerical modelling and experimental investigations of hydrodynamic, heat and mass transfer processes in such tube bundles has been carried out. The distribution of velocities, temperatures, and pressure in inter-tube channels have been obtained.

An Experimental Testing of Fillet Welded Specimens

2015 ◽  
Vol 752-753 ◽  
pp. 412-417 ◽  
Author(s):  
Martin Krejsa ◽  
Jiri Brozovsky ◽  
David Mikolasek ◽  
Premysl Parenica ◽  
Libor Zidek ◽  
...  
Keyword(s):  
Numerical Modelling ◽  
Stress Analysis ◽  
Numerical Models ◽  
Experimental Testing ◽  
Fem Analysis ◽  
Experimental Tests ◽  
Strength Characteristics ◽  
Fillet Welds ◽  
Commercial Software

The paper describes the experimental tests of steel bearing elements, which were aimed at obtaining material, geometric and strength characteristics of the fillet welds. Preparation of experiment consisted in defining of numerical models of tested samples using FEM analysis and the commercial software ANSYS. Data obtained from described experimental tests are necessary for further numerical modelling of stress analysis of steel structural supporting elements.

Modelling The Fire Performance of Structural Timber-Concrete Composite Floors

2014 ◽  
Vol 5 (2) ◽  
pp. 113-124 ◽  
Author(s):  
James O'Neill ◽  
Anthony Abu ◽  
David Carradine ◽  
Peter Moss ◽  
Andrew Buchanan
Keyword(s):  
Numerical Modelling ◽  
Fire Resistance ◽  
Experimental Testing ◽  
Mechanical Analysis ◽  
Fire Performance ◽  
Finite Element Software ◽  
Wide Range ◽  
Floor Systems ◽  
3D Numerical Modelling ◽  
Full Scale Tests

This paper describes numerical modelling to predict the fire resistance of engineered timber-concrete composite floor systems. The paper describes 3D numerical modelling of the floor systems using finite element software, carried out as a sequential thermo-mechanical analysis. Experimental testing of these floor assemblies has also been undertaken to validate the models, with multiple full scale tests conducted to determine the failure mechanisms and assess fire damage to the system components. The final outcome of this research is the development of simplified design methods for calculating the fire resistance of a wide range of engineered timber floor systems, as part of a larger research project on multi-storey timber buildings.

scholarly journals Selected aspects of a cold forging process for hollow balls

2021 ◽  
Author(s):  
Grzegorz Samołyk ◽  
Grzegorz Winiarski
Keyword(s):  
Numerical Model ◽  
Numerical Modelling ◽  
Wall Thickness ◽  
Experimental Testing ◽  
Wide Spectrum ◽  
Cold Forging ◽  
Hole Size ◽  
Forging Process ◽  
Experimental Findings ◽  
Theoretical Results

AbstractThis paper presents the results of a study investigating a cold forging process for producing hollow balls with different wall thicknesses. The study was performed by FEM numerical modelling, which made it possible to obtain a wide spectrum of results. For the analysis of FEM results obtained for problematic cases (shape defects in forged balls), novel hypotheses for results interpretation are proposed. The FEM numerical model and hypotheses are then verified via experimental testing, and selected theoretical results are compared with experimental findings. Finally, obtained results are discussed (e.g. the effect of billet dimensions on forging conditions, wall thickness and hole size), a method for FEM results interpretation is presented, and design-related solutions ensuring the production of defect-free hollow balls are proposed.

Numerical modelling of deep coaxial borehole heat exchangers in the Cheshire Basin, UK

2021 ◽  
Vol 152 ◽  
pp. 104752
Author(s):  
Christopher S. Brown ◽  
Nigel J. Cassidy ◽  
Stuart S. Egan ◽  
Dan Griffiths
Keyword(s):  
Numerical Modelling ◽  
Heat Exchangers ◽  
Borehole Heat Exchangers
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