An experimental investigation is conducted to study the influence of shear-thickening behavior on the primary breakup process of suspension jets. The primary breakup morphologies of cornstarch–water suspension are observed via a high-speed camera. The unique hardened breakup mode only occurs when the suspension exhibits discontinuous shear thickening (DST). During hardened breakup mode, the oscillating portion of the suspension jet becomes perpendicular to the air direction and keeps cylindrical instead of deforming into a thin sheet or membrane structure. The suspension jets break off into large pieces rather than tiny droplets. The dimensionless number N is established to describe the relative magnitude of the increment of the viscous force and aerodynamic force during the primary breakup process. The primary breakup regime map of Newtonian fluids and shear-thickening suspensions is also promoted based on the dimensionless number N and the Weber number We.

中文翻译：

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环形空气射流对剪切增稠悬浮射流的一次破碎

为研究剪切增稠行为对悬浮射流一次破碎过程的影响进行了实验研究。通过高速相机观察玉米淀粉-水悬浮液的主要破碎形态。独特的硬化破碎模式仅在悬浮液表现出不连续剪切增稠 (DST) 时发生。在硬化破碎模式下，悬浮射流的振荡部分变得垂直于空气方向并保持圆柱形而不是变形为薄片或膜结构。悬浮射流分裂成大块而不是微小的液滴。无量纲数N建立描述黏性力和气动力在初级破碎过程中增量的相对大小。基于无量纲数N和韦伯数We ，还推广了牛顿流体和剪切增稠悬浮液的初级破碎状态图。