Scholarlink

<p>The research is aimed at improving the accuracy of non-contact viscosity measurements under conditions of limited test liquid sample volume. A&#xa0;non-contact aerodynamic method, based on the deformation of the liquid surface by a&#xa0;gas jet, is considered. The method enables viscosity measurement directly inside the process equipment, liquid containers, or any vessel of arbitrary shape, provided the dimensions exceed minimum allowable limits. To determine the minimum vessel size, the effect of the distance from the walls and bottom of a&#xa0;rectangular vessel to the jet impingement area on the liquid surface was experimentally studied. Experiments were performed using a&#xa0;pulsed non-contact instrument with an inclined aerodynamic action (a&#xa0;non-contact aerohydrodynamic viscometer). Additional movable walls and a&#xa0;submerged movable bottom were utilized to change the vessel dimensions. Liquids with viscosities of 0.710 Pa·s (castor oil) and 26.1 Pa·s (epoxy resin) at 25 °C were studied. The angles of aerodynamic impingement were 20&#xa0;and 50&#xa0;deg., and the gas pressure upstream of the jet orifice was varied at two levels: 5.4&#xa0;and 7.0 kPa. The minimum vessel dimensions were determined to be 80 mm in length, 40 mm in width, and 20 mm in liquid layer thickness. In this case, the additional viscosity measurement error due to wall effects does not exceed 1.5%. The minimum volume of a&#xa0;liquid sample in a&#xa0;rectangular vessel is 64 ml. The obtained results are useful for personnel of chemical analysis laboratories providing services for the chemical, petroleum, electrical, and food industries.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Influence of vessel dimensions on the results of liquid viscosity measurements by the non-contact aerohydrodynamic method

  • 期刊论文

  • 发表日期：

    2026年6月19日

查看全文
  • A. P. Savenkov,
  • V. A. Sychev,
  • S. V. Mischenko

摘要

The research is aimed at improving the accuracy of non-contact viscosity measurements under conditions of limited test liquid sample volume. A non-contact aerodynamic method, based on the deformation of the liquid surface by a gas jet, is considered. The method enables viscosity measurement directly inside the process equipment, liquid containers, or any vessel of arbitrary shape, provided the dimensions exceed minimum allowable limits. To determine the minimum vessel size, the effect of the distance from the walls and bottom of a rectangular vessel to the jet impingement area on the liquid surface was experimentally studied. Experiments were performed using a pulsed non-contact instrument with an inclined aerodynamic action (a non-contact aerohydrodynamic viscometer). Additional movable walls and a submerged movable bottom were utilized to change the vessel dimensions. Liquids with viscosities of 0.710 Pa·s (castor oil) and 26.1 Pa·s (epoxy resin) at 25 °C were studied. The angles of aerodynamic impingement were 20 and 50 deg., and the gas pressure upstream of the jet orifice was varied at two levels: 5.4 and 7.0 kPa. The minimum vessel dimensions were determined to be 80 mm in length, 40 mm in width, and 20 mm in liquid layer thickness. In this case, the additional viscosity measurement error due to wall effects does not exceed 1.5%. The minimum volume of a liquid sample in a rectangular vessel is 64 ml. The obtained results are useful for personnel of chemical analysis laboratories providing services for the chemical, petroleum, electrical, and food industries.