the coefficient of viscosity of honey is greater than water.
the coefficient of viscosity of honey is greater than water.
coefficient of viscosity of honey is greater than?
water
the viscosity of honey is affected greatly by both temperature and water content. the higher the water percentage, the more easily honey flows. above its melting point, however, water has little effect on viscosity. aside from water content, the composition of honey also has little effect on viscosity, with the exception of a few types. at , honey with 14% water content generally has a viscosity around 400 poise, while a honey containing 20% water has a viscosity around 20 poise. viscosity increase due to cooling occurs very slowly at first. a honey containing 16% water, at , has a viscosity around 2 poise, while at , the viscosity is around 70 poise. as cooling progresses, honey becomes more viscous at an increasingly rapid rate, reaching 600 poise around . however, while honey is very viscous, it has rather low surface tension of 50–60 mj/m, thus the wettability of honey is on the same order as water, glycerin, or most other liquids. the high viscosity and wettability of honey lead to the phenomenon of stickiness, which is a time-dependent process in supercooled liquids between the glass-transition temperature (t) and the crystalline-melting temperature.
honey
in an arbitrary coordinate system, the viscous stress and the strain rate at a specific point and time can be represented by 3 × 3 matrices of real numbers. in many situations there is an approximately linear relation between those matrices; that is, a fourth-order viscosity tensor such that . the tensor has four indices and consists of 3 × 3 × 3 × 3 real numbers (of which only 21 are independent). in a newtonian fluid, by definition, the relation between and is perfectly linear, and the viscosity tensor is independent of the state of motion or stress in the fluid. if the fluid is isotropic as well as newtonian, the viscosity tensor will have only three independent real parameters: a bulk viscosity coefficient, that defines the resistance of the medium to gradual uniform compression; a dynamic viscosity coefficient that expresses its resistance to gradual shearing, and a rotational viscosity coefficient which results from a coupling between the fluid flow and the rotation of the individual particles. in the absence of such a coupling, the viscous stress tensor will have only two independent parameters and will be symmetric. in non-newtonian fluids, on the other hand, the relation between and can be extremely non-linear, and may even depend on other features of the flow besides .
viscous stress tensor