Ministry of Supply

About: Ministry of Supply is a based out in . It is known for research contribution in the topics: Polarography & Bacillus (shape). The organization has 416 authors who have published 355 publications receiving 8951 citations. The organization is also known as: MoS.

The initial behaviour of a spherical explosion II. Application to PETN charges in air and water

Abstract: The initial fields of disturbance due to explosions of spherical charges of PETN in air and water are calculated, using the analysis developed in part I. The results in air compare favourably with earlier calculations (Berry & Holt 1954). In water it is found that the second blast wave immediately moves towards the centre of the explosion, with very small initial strength.

A novel method of making aerosols.

Abstract: THE phenomena occurring when a closed vessel containing a simple liquid is heated to a temperature above the critical temperature of the liquid are well known. What happens when a solution, and more especially a solution of a substance having a very small vapour pressure, is treated in the same way is perhaps less familiar, although the findings of several investigators are on record1. In some binary systems a partial separation of the components takes place as the critical point is approached ; in others, no heterogeneity can be detected even when the liquid phase has vanished. In this connexion we have made some observations in small-scale experiments in which sealed capillary tubes (1 mm. bore, with thick walls) partly filled with aqueous solutions of potassium chromate were slowly heated. Even when the concentration of potassium chromate was increased to 50 gm. per 100 ml., no separation of solid occurred when the critical temperature (in this case, about 430° C.) was attained, and the whole of the system passed into the vapour state, the colour of the solute becoming uniformly distributed throughout the tube. On cooling, liquefaction took place and the original solution was spontaneously re-formed.

Performance of climbing film evaporators

Abstract: Performance data for three sizes of climbing film evaporator processing organic liquids are presented. The general trend of the quantitative measurements suggests the existence of a critical operating temperature difference to obtain a maximum performance. General observations of practical design value are offered.

Design of packed distillation columns. IV. An empirical method for the estimation of column height using the H.E.T.P. concept

Abstract: Published results on packed columns and some additional original data on semi-technical columns filled with Raschig rings are presented in a form permitting correlation of H.E.T.P. values with packing diameter, rate of liquid flow and liquid viscosity.