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Cross-sectional area variation as a key factor in pressure wave attenuation in bubbly flows: A theoretical analysis

Pressure waves propagating through bubble-containing liquids in tubes experience considerable attenuation. Researchers at the University of Tsukuba have derived an equation describing this phenomenon, demonstrating that beyond liquid viscosity and compressibility, variations in tube cross-sectional area contribute to wave attenuation.

Their analysis reveals that the rate of change in tube cross-sectional area represents a critical parameter governing pressure wave attenuation in such systems.

Pressure waves propagating through bubble-containing liquids in , known as “bubbly ,” behave distinctly from those in single-phase liquids, necessitating precise understanding and control of their propagation processes.

Stunning Digital Reconstruction Shows Face of 3,500-Year-Old Mycenaean Woman

A vivid digital reconstruction has brought to life the face of a Mycenaean woman who lived over 3,500 years ago, offering an unusually poignant glimpse into the world of ancient Greece, from long before the time of Homer or the Trojan War.

This ambitious project was launched at the initiative of Dr. Emily Hauser, a historian and lecturer in Classical Studies at the University of Exeter. The final image, she said, was both “incredibly exciting” and “unexpectedly modern.”

“For the first time, we are looking into the face of a woman from a kingdom associated with Helen of Troy —Helen’s sister, Clytemnestra, was queen of Mycenae in legend—and from where the poet imagined the Greeks of the Trojan War setting out,” Dr. Hauser explained in an interview published in the Daily Mail.

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