Affiliation:
1. Voronezh State Technical University
Abstract
The process of molding (flat pressing) of bakery and confectionery dough blanks, which are one of the important preparatory elements in the production technology of high-quality finished products, is investigated. Considering that the estimated indicators for predicting the quality of bakery and confectionery products are determined mainly by the rheological properties of the dough, a hydrodynamic model is proposed in which the problem of axisymmetric flow of a nonlinear viscous layer completely filling the space between two parallel absolutely rigid converging disks is solved. It is assumed that the incompressible model medium is described by the well-known Ostvadde de Ville equation, which also corresponds to bakery and flour confectionery semi-finished products by its basic rheological properties. The purpose of the proposed work is to study the flow of test material under axisymmetric compression under the action of constant force of approaching disks. The use of axisymmetric flow is due to its greater realism and ease of reproduction in laboratory conditions. Assuming a linear dependence of the tangential stresses on the radial pressure gradient, as well as the ideal adhesion of the deformable medium at the boundary of the approaching planes, analytical expressions are obtained showing the distribution of the radial flow velocity over the thickness of the deformable layer. Using the continuity equation, the distribution of the molding pressure over the surface of the deforming plates and the total force from the approaching disks are obtained. The obtained ratios describe not only the dynamics of the medium flow, but also allow, under the conditions of a single test, to determine the values of the rheological characteristics of the model medium: the coefficient of consistency (density) and the degree of viscosity. The experimental dependence of the layer thickness on the deformation time makes it possible to control the technological process of axisymmetric molding of flat dough blanks: pizza, cakes, noodles, etc..
Publisher
FSBEI HE Voronezh State University of Engineering Technologies
Subject
General Agricultural and Biological Sciences
Reference27 articles.
1. Rimareva L.V., Fursova N.A., Sokolova E.N., Volkova G.S. et al. Biodestruction of proteins of grain raw materials for the production of new bakery products // Questions of nutrition. 2018. vol. 87. no. 6. pp. 67–75. doi: 10.24411/0042–8833–2018–10068 (in Russian).
2. Toshchev A.D., Kolesnik N.A. Bread as an element of healthy nutrition // Young scientist. 2020. № 23(313). pp. 73–76. (in Russian).
3. Tulyakov D.G., Vitol I.S. Biochemical and rheological properties in the evaluation of different types of flour. Bread products. 2017. no. 6. pp. 30–34. (in Russian).
4. Ponomareva E.I., Alyokhina N.N., Gubareva Yu. P., Tereshchenko D.A. The effect of corn oil dosage on the quality indicators of dough and bakery products with sprouted flax seeds. Proceedings of VSUET. 2020. vol. 82. no. 1 (83). pp. 53–58. (in Russian).
5. Kalinina I.V., Fatkullin R.I., Ivanov D.S., Kiselova-Kaneva Y. et al. Investigation of the effect of food ingredients based on dihydroquercetin on the rheological properties of dough for bakery products. Herald of YUUGU. The series "Food biotechnologies". 2019. vol.7. no. 1. pp. 21–30. doi: 10.14529/food190103. (in Russian).