Abstract
In [1-4], different measurement methods were used to obtain the values of viscosity coefficients of metals, and their values for the same metals differ by times, and in some cases by orders of magnitude. One of the reasons for this discrepancy in the results is the use of Navier-Stokes equations with a constant viscosity coefficient. In this paper, a numerical calculation of the collapse of a copper pipe is carried out, taking into account the dependence of the viscosity coefficient on temperature. By comparing the results of this calculation with the data of [1], it is shown that the effect of viscosity change with temperature increase strongly changes the dynamics of the pipe compression process.
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