Research of non-isothermal flow processes of polyethylene-modified polypropylene melt in the cable head channel

RESEARCH OF THE PROCESSES OF NON-ISOTHERMAL FLOW OF MELTING OF A PROPYLENE BLOCKOPOLYMER WITH ETHYLENE IN THE CABLE HEAD CHANNEL

PROBLEMS OF APPLIED MECHANICS ◽

10.30987/conferencearticle_5fd1ed0472d3a2.62150390 ◽

2020 ◽

Author(s):

S Ershov ◽

E Subbotin ◽

A Scherbinin

Keyword(s):

Block Copolymer ◽

Numerical Study ◽

Isothermal Flow ◽

Melt Flow ◽

Technological Parameters ◽

Head Channel

The article is devoted to the numerical study of the processes of nonisothermal melt flow of a block copolymer of propylene with ethylene in the channels of the forming tool of cable heads when two-layer insulation is applied. The influence of technological parameters on the fields of speeds and temperatures is determined

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Some Generalizations in One-Dimensional Constant Density Fluid Dynamics

Journal of Engineering for Power ◽

10.1115/1.3673376 ◽

1962 ◽

Vol 84 (1) ◽

pp. 44-48

Author(s):

William G. Steltz ◽

Robert P. Benedict

Keyword(s):

Pressure Ratio ◽

Isothermal Flow ◽

Direct Application ◽

Constant Density ◽

Flow Function ◽

Flow Process ◽

One Dimensional ◽

Flow Maps ◽

Density Flow ◽

Flow Processes

We present a Generalized Constant Density Flow Function, Γ, which is shown to have direct application in the treatment of many simplified, workless, one-dimensional flow processes. Those particular flow processes treated in this paper are: the familiar adiabatic flows, with or without friction, with area variations always allowed; and diabatic flows with or without friction, with area variations always allowed. Moreover, the Γ function is shown to have significance in a generalized flow process having an arbitrary combination of heat transfer, friction, and area and elevation variation. Development of the Γ function is given in some detail. Schematic isentropic, Fanno, Rayleigh, and isothermal flow maps are presented in terms of the conventional enthalpy—entropy diagram, and again in terms of the pressure ratio—Γ diagram. Numerical examples are included to illustrate the solution of typical problems through use of the Generalized Constant Density Flow Function.

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