Month: February 2019

IYPT 2019 Elements 004: Beryllium, emeralds, and NASA telescopes

Element number three in our series of International Year of the Periodic Table graphics, made in partnership with the Royal Society of Chemistry, is beryllium. Beryllium is found in the mineral beryl, varieties of which include emerald and aquamarine. As one of the lowest density metals, gold-plated beryllium was used to make the 18 mirrors of …

A Thermal Elastohydrodynamic Lubrication Model for Crowned Rollers and Its Application on Apex Seal–Housing Interfaces

This paper presents a thermal elastohydrodynamic lubrication (EHL) model for analyzing crowned roller lubrication performances under the influence of frictional heating. In this thermal EHL model, the Reynolds equation is solved to obtain the film thickness and pressure results while the energy equation and temperature integration equation are evaluated for the temperature rise in the …

IYPT 2019 Elements 003: Lithium, the element powering your internet addiction

Element number three in our series of International Year of the Periodic Table graphics, made in partnership with the Royal Society of Chemistry, is lithium. Lithium is one of only three primordial elements created by the Big Bang (along with hydrogen and helium, who we’ve already met). It’s also the element we have to thank …