Nano HA rod was synthesized by precipitation method using Ca(NO3)24H2O and (NH4)2HPO4 as starting materials and ammonia solution as an agent for pH adjustment. The Ca/P molar ratio was maintained at 1.67. Then, the effect of different pH (4, 6, 8, 10, 11), different surfactants and different times for dialyses on nano HA rod were studied in this study. The samples were characterized by differen...

Cold drawing is a commonly used metal forming technique carried out by pulling billet through die cavity to obtain desired dimensions. Ideally, the cross-sectional area of drawn product should be equal that at its exit; however, former one always larger after drawing, in practice. In this study, cold an AISI-316 stainless steel rod investigated finite element analysis. The difference between ra...

a new method for increasing ldr in deep drawing is application of anti-lock braking system (abs) on blank holder. in this method, instead of applying a constant force on blank and control the metal flow, the abs system holds and releases the blank several times (20 to 50 times) which results increasing ldr. this study investigates the effect of different parameters of abs on improving the condi...

The main purpose of this study is to perform numerical simulation of nanofluids as the coolant in VVER-440 fuel rod bundle. The fuel rod bundle contains 60 fuel rods with length of 960 mm and 4 spacer grids. In VVER-440 fuel rod bundle the coolant fluid (water) is in high pressure and temperature condition. In the present Thermo-hydraulic simulation, water-AL2O3 nanofluids containing various vo...

The aerodynamic force of vehicles has been affected by the geometric shape front surface. a scaled bus model and CD were experimentally determined in wind tunnel. experimental tests conducted at 6 different free flow velocities. They performed range 3.8×103- 7.9×103 Reynolds number. drawing data obtained 3D scanned drawn Solid Works program. circular cross section control rod was designed 10 mm...

This paper presents a new ultrasonic sensor for 3D co-ordinate estimation, which has been especially designed to localize and sketch findings after they are extracted by archaeologists. Classical tasks at paleo-archaeological excavations are: measuring position with metric tapes, drawing a sketch of found object, and introducing all information into a database manually; operations that are not ...