Slurry concentration
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Water-coal slurry is a complex fluid; at low concentrations, it exhibits the properties of a Newtonian fluid, while at high concentrations it behaves as a non-Newtonian fluid. Does anyone know at what concentration range water-coal slurry changes from a Newtonian fluid to a non-Newtonian fluid? The more precise the range, the better!
Theoretical research is good, but in actual production, higher values are certainly better; this is also a major reason why lignite cannot be utilized with the water-coal slurry technology.
Regarding this issue, it is actually a purely theoretical one; it holds little significance for production. What matters in production is to deliver as much coal slurry as possible into the furnace, and the type of flow used to do so is not that important.
This issue definitely requires experimental testing. Try using a viscometer to see if the viscosity change is within the acceptable range.
Well, non-Newtonian fluids also have the characteristic of low resistance, which is quite practical for transportation purposes