It is essential to formulate a refractive index (RI)-matched fluid to use in silicone phantom models for particle image velocimetry (PIV) experiments. In this work, an extensive effort to develop a non-Newtonian human milk-mimicking fluid (HMMF) with different concentrations of sodium iodide (NaI), glycerol (Gly), xanthan gum (XG), and distilled water (DW) is conducted. Measurements of RI and density are fitted onto a linear empirical expression relating to the NaI and Gly concentration. The Cross model was utilized to find the nonlinear viscosity model of raw human milk. HMMF solution is generated from a multi-constrained optimization. The matched HMMF, suitable for use in the lactating human breast phantom with bifurcated ductal structures, is achieved with composition of 15.69% NaI, 30.27% Gly, 54.02% water and 0.02% XG by weight percentage resulting in a non-Newtonian viscosity matched with that of human milk.

中文翻译：

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用于 PIV 实验的人乳模拟液

必须制定折射率 (RI) 匹配的流体，以用于粒子图像测速 (PIV) 实验的硅胶模型模型。在这项工作中，进行了大量努力开发具有不同浓度碘化钠 (NaI)、甘油 (Gly)、黄原胶 (XG) 和蒸馏水 (DW) 的非牛顿母乳模拟液 (HMMF) . RI 和密度的测量值拟合到与 NaI 和 Gly 浓度相关的线性经验表达式上。Cross 模型用于寻找生母乳的非线性粘度模型。HMMF 解决方案是从多约束优化生成的。匹配的 HMMF 适用于具有分叉导管结构的哺乳期人类乳房模型，其组成为 15.69% NaI、30.27% Gly、54.02% 水和 0.