Authors:Réka Sárközi, Péter Iványi, and Attila Béla Széll
+ cupola 5 Rotational grids 5.1 Mathematical calculations Based on the vault tool two types of rotational grid tools are also created. These components transform a grid given in Cartesian coordinate system to cover a surface of revolution. The generating
Gioncu V., Petcu D. Available rotation capacity of wide-flange beams and beam-columns, Part 1, Theoretical approaches, Part 2, Experimental and numerical tests, Journal of Constructional Steel Research , Vol. 43
Timber joints are usually considered as perfectly pinned or stiff against rotation during the calculations of engineering timber structures. However the semi-rigid behavior the joints cannot be avoided in case of accurate calculations. In this paper the rotational stiffness and the full moment-rotational behavior of dowel-type timber joints were analyzed using computer algorithm validated by finite element analysis. Based on the numerical calculation and the experimental results the paper describes the influences of the joint geometry, the grain direction and the number and position of connectors on the moment-rotational behavior.
Authors:F. Khalfallah, Z. Boumerzoug, S. Rajakumar, and E. Raouache
rotating sample is pressed against a stationary sample as shown in Fig. 1(a and b) . The friction at the interface generates the welding heat, which upset the samples ( Fig. 1c ). Finally, the rotation stops and a forging pressure is introduced to achieve
Authors:Olena Yakymchuk, Dmytro Yakymchuk, Nataliia Bilei-Ruban, Iryna Nosova, Serhiy Horiashchenko, Kostyantyn Horiashchenko, Tetyana Kisil, and Viacheslav Tuz
nozzle; engine drive; pump for LAWE pulling out; tachometer; system of displacement and orientation of a nozzle; LAWE pressure control unit; control unit for shaft rotation speed with a part; PC; power supply unit microcontroller. The semi
Jesenik M., Gorican V., Trlep M., Hamler A., Stumberger B. Field homogeneity in a twophase round rotational single sheet tester with one and both side shields,
J. of Magn. and Magn. Mat
, Vol. 254–255, 2003, pp. 247
The paper is an overview of issues related to the space creation of a building, possibilities of developing frame structure and connections of force distribution in the construction. In plane the force distribution can be compression, bending and tension. In space “enclosing” a geometric solid means space creation. In space as it is to be expected, the force distribution must be compression, bending and tension in two different directions at the same time. This can be really variant but in the case of surface or surface-like constructions generated by translations (and/or rotations) on one hand, there are some other surfaces, which cannot be generated by translations (and/or rotations), on the other hand, the dimension of the inside “forces” is not two but three (independent components of a two-by-two tensor either in the case of compression tension, or in the case of bending). By this, force distribution is more complicated in space than in plane.
Authors:S. M. El-Behery, W. A. El-Askary, M. H. Hamed, and K. A. Ibrahim
Heat transfer in gas-solid two-phase flow is investigated numerically and experimentally. The numerical computations are carried out using four-way coupling Eulerian-Lagrangian approach. The effects of particle rotation and lift forces are included in the model. The gas-phase turbulence is modeled via low Reynolds number k-ε turbulence models. The SIMPLE algorithm is extended to take the effect of compressibility into account. The experimental study is performed using crushed limestone to simulate the solid phase. The effects of Reynolds numbers, particles size and temperature on the pressure drop and the temperature of the phases are investigated. The model predictions are found to be in a good agreement with available experimental data for high speed gas-solid flow and present experimental data for low speed flow. The present results indicate that heat transfer in gas solid flow can be modeled using ideal gas incompressible flow model at low conveying speed, while for high speed flow, a full compressible model should be used.