Solution to the molecular mechanism underlying non-Newtonian fluids?
In a previous post I presented a challenge: What is the mechanism underlying non-Newtonian fluids? In this post I provide the solution.
In the previous post I provided a link to another video that contained a hint. We will get to that further along. First I would like to discusss another concept/conjecture for which I provided no hint but for which I had previously discussed in a prior post on this website entitled: Polarity Neutralization Implication of Hydrogen Bonds Between Water Molecules and Groups Thereof. Therein I asserted that unlike other types of bonds the force associated with a hydrogen bond is consumed (neutralized) by the completion of a bond between two water molecules. Consequently when a water molecule has two bonds on its negative oxygen molecule the polarity is neutralized and the resulting force of the bond disappears (2∂ – 2∂ = 0∂). So, when there are two hydrogen bonds completed the positively charged hydrogen atoms just kind of float. The only thing holding them is that if they move away the charge returns pulling them back.
However, and most significantly, when there is only one hydrogen bond completed then there is a considerable amount of the polarity induced bond strength remaining (2∂ – 1∂ = 1∂). This remaining bond strength creates a very hard bond. This is the same hard bond associated with ice. Through this we can understand why ice expands as it hardens since the hardening has to do with excluding one of the two bonds, forcing it away.
Through this understanding we can also, I contend, understand the strange behavior of non-Newtonian fluids: when force is applied the starch molecules, being very small, exert inter-molecular force on the water molecules. By tearing off the first of the two molecules (which comes off fairly easily) the starch leaves behind one hard connection. So, essentially, what is happening is that the starch is forcing the water to become ice for a fraction of a second. This explains the mechanism underlying non-Newtonian fluids.
Jim McGinn (AKA Claudius Denk)