Kumbár Vojtěch, Ondrušíková Sylvie, Trost Daniel, Polcar Adam, Nedomová Šárka
Department of Technology and Automobile Transport (Section Physics), Faculty of AgriSciences, Mendel University in Brno, Zemědělská 1665/1, 613 00 Brno, Czech Republic.
Department of Food Technology, Faculty of AgriSciences, Mendel University in Brno, Zemědělská 1665/1, 613 00 Brno, Czech Republic.
Foods. 2021 Dec 17;10(12):3130. doi: 10.3390/foods10123130.
Liquid egg products are one of the basic raw materials for the food industry. Knowledge of their rheological and flow behaviour in real technical elements is absolutely necessary for the selection of suitable technological equipment for their processing. In this article, the rheological properties of liquid egg products were determined. Eggs from six different species of poultry are used: domestic hen () hybrid ; Japanese quail (); German carrier goose (); domestic ducks (); domestic guinea fowl (); and domestic turkeys (). Liquid egg products showed pseudoplastic behaviour in range of shear strain rates from 0.2 up to 200 s and at the temperature of 18 °C. Thus, the flow curves were constructed using the Ostwald-de Waele rheological model, with respect to the pseudoplastic behaviour of liquid egg products. According to the values of the coefficients of determination (), the sum of squared estimate of errors (SSE) and the root mean square error (RMSE), this model was appropriately chosen. Using the consistency coefficient , the flow index and the adjusted equations for the flow rate of technical and biological fluids in standard pipelines, the 3D velocity profiles of liquid egg products were successfully modelled. The values of the Reynolds number of the individual liquid egg products were calculated, and the type of flow was also determined. A turbulent flow has been detected for some liquid egg products.
液态蛋制品是食品工业的基本原料之一。了解它们在实际技术元件中的流变学和流动行为对于选择适合其加工的工艺设备绝对必要。在本文中，测定了液态蛋制品的流变特性。使用了六种不同家禽的蛋：家鸡（）杂交种；日本鹌鹑（）；德国朗德鹅（）；家鸭（）；家珍珠鸡（）；以及家火鸡（）。液态蛋制品在剪切应变率从0.2到200 s以及温度为18°C的范围内表现出假塑性行为。因此，针对液态蛋制品的假塑性行为，使用奥斯特瓦尔德-德瓦勒流变模型构建了流动曲线。根据决定系数（）、误差平方和估计值（SSE）以及均方根误差（RMSE）的值，该模型被适当选用。利用稠度系数、流动指数以及标准管道中技术流体和生物流体流速的修正方程，成功模拟了液态蛋制品的三维速度分布。计算了各液态蛋制品的雷诺数，并确定了流动类型。已检测到一些液态蛋制品存在湍流。
