Table of Contents
What is viscosity baking?
Viscosity is the thickness or resistance to flow of a fluid. It is the measure of shear stress/shear rate. Shear stress is the force per unit area used to move a material. For example, water would have a lower viscosity than cake batter. Centipoise (cP) is the standard unit of measure for viscosity in the USA.
How is viscosity useful?
Viscosity of a liquid is an important parameter as it can be used as an indicator of quality by the consumer, in some instances a thicker liquid being thought of as superior quality when compared to a thinner product. Viscosity is also a characteristic of the texture of food.
How do you measure viscosity of dough?
The u-tube capillary viscometer is a simple method to qualitatively estimate viscosity. This method measures the resistance of liquid to flow through a ‘U’-shaped capillary channel.
What is the viscosity of cake batter?
With increased amounts of OSP, batter viscosity and consistency decreased (from 27430 to 11030 centipoise and from 8.67 to 13.42 g/s, respectively), while the specific volume of the cakes increased (from 2.08 to 6.21 cm ³ /g).
What is the SI unit of viscosity?
Pascal-second
Dynamic viscosity: The SI physical unit of dynamic viscosity (μ) is the Pascal-second (Pa s), which is identical to 1 kg m−1 s−1. The physical unit for dynamic viscosity in the centimeter gram second system of units (cgs) is the poise (P), named after Jean Poiseuille.
What is an example of high viscosity?
Fluids with low viscosity have a low resistance and shear easily and the molecules flow quickly; high viscosity fluids move sluggishly and resist deformation. Some liquids, like pitch, glass and peanut butter, have such high viscosity they behave like solids. For example, water at 20°C has a viscosity of 1.002 cPs.
What is viscosity and examples?
Viscosity, resistance of a fluid (liquid or gas) to a change in shape, or movement of neighbouring portions relative to one another. Molasses, for example, has a greater viscosity than water.
What happens if viscosity increases?
Viscosity is a measure of an oil’s resistance to flow. It decreases (thins) with increasing temperature and increases (or thickens) with decreased temperature. A general increase in viscosity at higher temperatures, which results in lower oil consumption and less wear.
How do you measure viscosity?
Ways to Measure Viscosity
- Capillary Viscometer. The earliest methods for measuring viscosity were based on using capillary tubes and measuring the time it took for a volume of liquid to pass through the length of the tube.
- Zahn Cup.
- Falling Sphere Viscometer.
- Vibrational Viscometer.
- Rotational Viscometer.
Why is viscosity important to bakers?
In the baking industry, viscosity plays a very important role as it will impact the chance of phase separation, affecting the products made from batter and dough. If a cake batter has a low level of viscosity, the phases will separate easily at the wrong time resulting in a poor-quality cake.
What makes a batter a batter?
What Is Batter? A batter is a thin blend of flour, egg, and liquid that you cannot knead. Derived from the French word battre, meaning ‘to beat’, you make batters by beating/whisking their ingredients together.
What is the SI unit of viscosity * 1 point?
pascal second
The SI unit of viscosity is the pascal second (Pa·s) or kg·m−1·s−1.