Element 55 in our International Year of the Periodic Table series is caesium. Caesium is used in atomic clocks and is the most reactive metal in the periodic table. Caesium is the element most commonly used in atomic clocks, which provide the most accurate times. Since 1967, the second has been defined in reference to …
Month: August 2019
Element 54 in our International Year of the Periodic Table series is xenon. Xenon is used in some car headlights, to propel some satellites and spacecraft, and also in some types of medical imaging. Many car headlights, particularly those in more modern cars, use xenon. Despite commonly being referred to as xenon headlights, these are …
The objectives of this investigation were to design and develop an experimental turbocharger test rig (TTR) to measure the shaft whirl of the rotating assembly and the axial and frictional loads experienced by the bearings. The TTR contains a ball bearing turbocharger (TC) that was instrumented and operated under various test conditions up to 55,000 …
Element 53 in our International Year of the Periodic Table series is iodine. This element is found in (and can be extracted from) seaweed, and is also used in LCD screens in phones and televisions. Iodine is one of the more unusual elements in the periodic table in terms of its appearance. At room temperature, …
The work presented in this paper describes a new approach to calculate the film profile, friction, and fluid transport of a reciprocating U-cup seal used in a hydraulic piston pump. An innovative partial lubrication model of the seal is developed, which connects the inverse hydrodynamic lubrication method and Greenwood–Williamson asperity contact model. Finite element models …
