A numerical investigation is performed to study the thermal-hydraulic performances of tube-on-sheet heat exchanger. Especially, this paper focused on effects structure parameters (fin angles, fin lengths, pitches, widths, and tube arc radius) characteristics The exchanger optimized structural are obtained. results reveal that main performance angle, length, pitch, width. Furthermore, decreasing...

Numerical investigation for turbulent flow of nanofluid (Ethylene glycol/water-Al2O3) is carried out with a volume fraction 0.5%, 1%, and 1.5%. The diameter solid nanoparticles equal to 20 nm. range Reynolds number in this simulation from 6300 27500 through three-dimensional steel corrugated spirally tube. For enhancement the heat transfer performance internal horizontal tube, tube combined alu...

The laser tube bending process (LTBP) is a thermal non-contact for tubes with less springback and thinning of the tube. In this paper, will be studied experimentally. length irradiation scheme are two main affecting parameters in LTBP process. For purpose, different samples according to schemes (Circular irradiating (CIS) axial (AIS)) lengths beam (from 4.7 28.2 mm) fabricated. angle laser-bent...

To demagnetize small-scale objects (dimensions less than 1 m) fabricated from ferromagnetic materials, it is standard practice to expose the object to a continuous ac applied magnetic field with a steadily decaying amplitude. For objects of dimensions greater than 10 m, there are problems of scale, and a stepwise procedure is preferred. We have simulated two different stepwise demagnetization t...

The wide range of possible applications for the portable X-ray apparatus with an air cooled double-anode X-ray tube are presented. The apparatus is provided with a stress measurement unit and focusing camera for phase analysis. The distinctive characteristics of the apparatus are a small weight (a 4 kg), fine focus ray tube, portability and ease of use for both laboratory samples and industrial...

experimental tests were performed to study the seismic behavior and performance ofmodified steel chevron braced frame systems, which incorporate a vertical slotted connection(vsc) detail between the top of the braces and the floor beam above. the vsc detail isintended to prevent vertical load transfer to the beam and limit brace forces to thecompressive resistance of the members. full-scale qua...

Explosive forming is one of the unconventional techniques in which, most commonly, the water is used as the pressure transmission medium. One of the newest methods in explosive forming is gas detonation forming which uses a normal shock wave derived of gas detonation, to form sheet metals. For this purpose a detonation is developed from the reaction of H2+O2 mixture in a long cylindrical detona...

In order to optimize the continuous rolling schedule for improving the quality of rolled tube billet, three dimensional thermal mechanical coupled finite element simulation is applied to analyse the multi-pass continuous rolling process of Ф100mm 37Mn5 steel tube billet from 200mm×200mm square cast bloom. Due to the larger plastic strain occurring at the corner area of the billet, the bias mesh...

Evaporative heat transfer coefficients of R~22 and R-407C (R-32/125/134a, 23/25/52 wt%) in a horizontal smooth tube have been measured. Heat was transferred to theJefrigerant at the test section by applying electric current directly to the stainless steel tube. Saturation temperature of refrigerant was calculated from the measured pressure. The inner wall temperatures were calculated by one dim...

Abstract Due to high bearing capacity and excellent seismic performance, the section steel reinforced concrete-filled rectangular tube has been widely applied in engineering. The application of stainless for outer can improve durability performance members. In this study, ABAQUS software was used perform nonlinear analysis on tubular columns, numerical model validated against experimental data....