deborah number การใช้

• The Deborah Number is particularly useful in conceptualizing the time temperature superposition principle.
• The Deborah number, a dimensionless number used in rheology, is named after her.
• The Deborah Number was originally proposed by Markus Reiner, a professor at Judges 5 : 5 ).
• While Wi is similar to the Deborah number and is often confused with it in technical literature, they have different physical interpretations.
• Time-temperature superposition avoids the inefficiency of measuring a polymer s behavior over long periods of time at a specified temperature by utilizing the Deborah Number.
• A material at low temperature with a long experimental or relaxation time behaves like the same material at high temperature and short experimental or relaxation time if the Deborah number remains the same.
• In contrast, the Deborah number should be used to describe flows with a non-constant stretch history, and physically represents the rate at which elastic energy is stored or released.
• Formally, the Deborah number is defined as the ratio of the relaxation time characterizing the time it takes for a material to adjust to applied stresses or deformations, and the characteristic time scale of an experiment ( or a computer simulation ) probing the response of the material: