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To understand why the mixture solidifies at different values of ϕ for low- and high-stress mixing, consider how particles interact under those conditions. Three regimes emerged: Below ϕ = 0.55, the suspensions flowed above ϕ = 0.70, permanent granules formed in between, large granules that were present after high-stress mixing relaxed into fluids following low-stress vortexing. The top row shows each sample after high-stress mixing with an impeller, and the bottom row shows the same samples after subsequent low-stress mixing with a vortexer. The samples in the figure were made by combining glycerol with 10-µm-diameter glass particles at a range of solid-volume fractions ϕ. Their results point to jamming as the primary mechanism behind the transition between fluid and granular phases. Now Daniel Hodgson and Wilson Poon at the University of Edinburgh in the UK and their collaborators have developed a model that quantifies the transition between the two ends of the spectrum. In the mixing of cement, on the other hand, the desired product is a high-solid-content dispersion, like on the left side of the figure, that can be poured.īoth of those examples are liquid–powder mixtures, yet physical systems at the two ends of the wetness spectrum have previously been treated as distinct. The applications typically fall at the far ends of the wetness spectrum: Production of powdered laundry detergent, for example, employs so-called wet granulation-in which a small amount of added liquid binds microscopic particles together in small clumps, or granules, like those on the right side of the figure.
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Incorporating liquids into powders is also common in industrial materials processing. But just the right amount makes a smooth, flowing batter.
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Adding just the right amount of moisture is critical to making the batter: Not enough liquid results in dry clumps, whereas too much produces a watery mess. Rheol., in press, Ĭake recipes typically instruct bakers to add wet ingredients to a powdery flour mixture. these inspiring images of the human body will consistently touch your heart and take your breath away.Credit: D. Join us in restoring human beauty to its rightful place as a work of art!
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Model Society Magazine is for photographers, art lovers and anyone who appreciates the incredible beauty of the human body.īreak free from the cultural hypnosis of beauty standards and reclaim your experience of human beauty as your own. In each issue, we will be sharing handpicked images and articles that explore the entire spectrum of human beauty. Enjoy some of the world’s best art, as we introduce you to the creative talents who are at the core of this emerging movement. With Model Society Magagine, you'll enjoy a refreshing vision of the human form and experience gorgeous models through the eyes of top fine art photographers. We have the rare opportunity to experience some of her remarkable and almost unbelievable adventures in pursuit of beauty. In these 160 pages, we accompany April on her great adventure through modeling, photography, and life. Through her eyes we see models elevated to true Olympian heights. She apologetically celebrates physical fitness and classical beauty. The modeling and photography of April McKay put the human form on an epic pedestal. As a model and a photographer, she has cultivated an incredible portfolio that’s many times more expansive than anything we’ve seen. With her bottomless passion, April has become fluent in making art from both sides of the camera. For those who join her, April is an experienced guide, mentor, collaborator, and trusted travel companion. They endure discomfort and sleeplessness as they face the wilderness on a pilgrimage to make great art. In her adventures, she takes models and photographers away from the civilized boundaries of our everyday world to go on a hero’s journey. April McKay lives in relentless pursuit of epic imagery.