Accession Number : ADA193853

Title :   The Viscosity of Molten TNT,

Corporate Author : MATERIALS RESEARCH LABS ASCOT VALE (AUSTRALIA)

Personal Author(s) : Parry, M A ; Billon, H H

PDF Url : ADA193853

Report Date : Dec 1987

Pagination or Media Count : 32

Abstract : The flow behaviour of pure and commercial molten TNT, when subjected to very high rates of shear in the temperature range 82.0 to 95.4 C, is presented. All the data obtained suggest that molten TNT is Newtonian, contrary to some published work, and the temperature dependence of the viscosity of pure TNT is adequately described by an Arrhenius-type relationship of the form nu = Ae(B/T) where A = 0.000541, B =3570 and T is the Kelvin temperature. This equation is characteristic of a simple isotropic liquid. A similar relationship is obtained for commercial TNT. Under some instrumental conditions discontinuities are seen in the shear stress shear rate flow curves. An analysis of these discontinuities shows them to be caused by the transition from laminar to turbulent flow. Possible implications for processibility and initiation of explosives are discussed.

Descriptors :   *TNT, *VISCOSITY, *FLUID DYNAMICS, *LIQUID EXPLOSIVES, AUSTRALIA, DISCONTINUITIES, EQUATIONS, EXPLOSIVES, HIGH RATE, ISOTROPISM, LAMINAR FLOW, LIQUIDS, MELTS, THERMAL PROPERTIES, TURBULENT FLOW, FLUID FLOW

Subject Categories : Ammunition and Explosives
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE