What are rheological properties in foods?
The rheological properties of liquid food are altered based on the thermal properties such as density, heat capacity and thermal conductivity. The most important factors which determine the properties of liquid food are shear flow properties. These are based on shear rate and shear stress.
What causes thixotropy?
Thixotropy arises because particles or structured solutes require time to organize. Some fluids are anti-thixotropic: constant shear stress for a time causes an increase in viscosity or even solidification. Fluids which exhibit this property are sometimes called rheopectic.
Is honey a Newtonian fluid?
Honey is an example of a non-Newtonian fluid – a fluid that changes its behavior when under stress or strain.
Which gel shows a thixotropic behavior?
In other words, a thixotropic solution has properties of a gel (at rest) and properties of a fluid when a shear force is applied. Alginates (Chapter 14). are examples of hydrocolloids whose solutions can exhibit thixotropic behavior.
Is peanut butter thixotropic?
And so that, peanut butter system can rebuild the network structure destroyed by shear stress faster (Li, 2010). This phenomenon is called anti-thixotropic activity. That has a certain effect on enhancing the rheology stability and improving the quality of the products.
Is mayonnaise thixotropic fluid?
Mayonnaise is a non-Newtonian, pseudoplastic fluid show- ing the yield stress and thixotropy phenomena [4–9]. It also has viscoelastic properties [10–12].
Is milk a Newtonian?
Normal milk behaves as a Newtonian liquid and its viscosity is affected by temperature, fat content, protein content, total solids, and solid-to-liquid fat ratio (Fernandez-Martin, 1972; Randhahn, 1973; Bloore and Boag, 1981; Langley and Temple, 1985; Velez-Ruitz and Barbosa-Canovas, 1998, 2000).
What is an example of a Newtonian fluid?
A key difference between Newtonian and Non-Newtonian fluids is their reaction to the forces they experience during processing….The Importance of Newtonian and Non-Newtonian Fluid Dynamics in Processing.
| Newtonian Fluid Examples | Non-Newtonian Fluid Examples |
|---|---|
| Motor Oil | Toothpaste |
| Water | Cosmetics |
| Gasoline | Butter |
| Cheese |