Possibility of equation of variable-mass motion to describe the motion of non-Newtonian fluids
DOI:
https://doi.org/10.15587/1729-4061.2013.14820Keywords:
Pipeline, variable mass, non-Newtonian fluid, destabilization, local resistance, transit expenseAbstract
Introduction. Tasks related to method of calculation of viscid and anomalously-viscid liquids with mass (or by an expense), changing on length development are widely used in many areas of industry.
The unsteady-state processes of the plumbings systems, irrigation, systems used in a fire technique, as a rule determine their work and reliability in the exploitation conditions. However such processes can reason the equipment work destabilization and ground of calculation parameters systems problem that provides reliability of work actual.
Research aim is unsteady-state motion of viscid liquids in pressure pipelines and systems with a variable on length by mass of liquid calculation methods generalization .
Outputs.
Based on a reduced equation expressions pressure characterizing change on length for two cases are received:
- absence of the transit expenditure ():
- presence of the transit expenditure
which check on the experimental bench, allowed to set that in case of order 100-300 Reynolds numbers essential influence of destabilization of a flow is absent. Thus, application equation of variable-mass motion in this case is lawful. As researched liquids water solution of glycerin (the Newtonian liquid) and solutions by carbon methyl cellulose CMC (2%, 4%) were usedReferences
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