What is pseudoplastic rheology?
A descriptive term for a fluid with shear-thinning characteristics that does not exhibit thixotropy. Pseudoplastic rheology, low viscosity at high shear rates and high viscosity at low shear rates, benefits several aspects of drilling-higher drilling rate and improved cuttings lifting.
What is pseudoplastic fluid?
In contrast to a Bingham fluid, a pseudoplastic fluid is a fluid that increases viscosity as force is applied. A typical example is a suspension of cornstarch in water with a concentration of one to one. This cornstarch behaves like water when no force is applied; however, it is solidified as force is applied.
What is rheology and its types?
DEFINITION OF RHEOLOGY Rheology is the science/physics that concerns with the flow of liquids and the deformation of solids. Study of flow properties of liquids is important for pharmacist working in the manufacture of several dosage forms, viz., simple liquids, gels, ointments, creams, and pastes.
What is the difference between plastic and pseudoplastic?
Difference between the plastic and pseudoplastic. The plastic gives velocity decreases as shearing rates increases. The psedoplastic gives velocity decreases with an increase shear thinning.
What is Pseudoplastic Behaviour?
Pseudoplastic: Pseudoplastics exhibit behaviors both of Newtonian flow and plastic flow. The liquid flows as a plastic at high shear rates, but does not have a yield point and so will always flow under a shear stress, like a Newtonian liquid.
What is pseudoplastic Behaviour?
What is the purpose of rheology?
Rheology is used to describe and assess the deformation and flow behavior of materials. Fluids flow at different speeds and solids can be deformed to a certain extent.
Is blood a pseudoplastic?
An example of pseudoplastic fluid is blood. This application is highly favored within the body, as it allows the viscosity of blood to decrease with increased shear strain rate [20]. Newtonian fluid is a special case of the non-Newtonian time-independent fluid where the viscosity is constant.
What are the types of viscometer?
6 Different Types of Viscometers & How They Work
- Orifice viscometers.
- Capillary viscometers.
- Falling piston viscometers.
- Rotational viscometers.
- Falling ball viscometers.
- Vibrational viscometers.
What are examples of rheological properties?
Example of such properties includes elasticity, poisson ratio and relaxation time and shear modulus….There are three types of moduli may be calculated for a Hookean solids depending upon the method of applying the force:
- Modulus of elasticity (E)
- Modulus of rigidity (G)
- Modulus of bulkiness (K)
What is the basic concept of rheology?
Rheology is the science of deformation of materials. Rheology is a science that focuses on understanding how the materials (being them liquids, gases, etc.) react to force being applied to them. This impact is accounted as stress, which is the ratio between the force being applied and the unit area.
What causes a curved rheogram for pseudoplastic materials?
• The curved rheogram for pseudoplastic materials is due to shearing action on the long chain molecules of materials such as linear polymers. 2014/03/09 10 Faculty of Pharmacy, Omer Al-Mukhtar University, Tobruk, Libya. 11.
What happens to viscosity of pseudoplastic fluid as shear rate increases?
A pseudoplastic fluid is one whose viscosity decreases as the shear rate in the pump increases. Pseudo-plastic fluids are also referred to as shear-thinning fluids. The viscosity of these fluids will decrease with increasing shear rate.
What do you need to know about rheology?
3. Definition of Rheology • Rheology is the science/physics that concerns with the flow of liquids and the deformation of solids. • Study of flow properties of liquids is important for pharmacist working in the manufacture of several dosage forms, viz., simple liquids, gels, ointments, creams, and pastes.
Which is an example of a pseudo plastic fluid?
Pseudo-plastic fluids are also referred to as shear-thinning fluids. The viscosity of these fluids will decrease with increasing shear rate. Therefore, for these fluids, the exponent Eq. 9.4 is n < 1. Typical examples for pseudo-plastic fluids are polymer solutions and similar solutions of high molecular weight substances.