The deformation mode that extends in one direction and contracts in a direction perpendicular to it is called elongational flow!
When mochi is grilled, it expands. This is because the moisture inside turns into steam, increasing the internal volume and causing the mochi to puff up like a balloon. Due to the expansion of the internal steam, the distance between points A and B on the surface of the sphere widens, and the thickness becomes thinner. When it reaches a thinness that cannot withstand the internal pressure, it bursts. The deformation mode that stretches in one direction and contracts in a direction perpendicular to it is called extensional flow. In this column, we will explain "Extensional Flow." [Contents] - Shear Flow and Extensional Flow - Relationship between Shear Viscosity and Extensional Viscosity *For detailed content of the column, please refer to the related links. For more information, feel free to contact us.
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