标题： BiconeDrag - 用于振荡锥形杆界面剪切流变仪的数据处理应用程序 显示英文标题

标题： BiconeDrag - A data processing application for the oscillating conical bob interfacial shear rheometer

摘要： BiconeDrag是一个软件包，允许对通过旋转双锥剪切流变仪获得的表面活性剂覆盖的气-液界面的动态界面流变数据进行基于流场的数据处理。 提供了该程序的MATLAB和Python版本。 双锥夹具被广泛用于将传统的体积旋转流变仪转换为界面剪切流变仪。 通常，此类系统由一个双锥转子组成，该转子安装在流变仪的转子上，并且有一个圆柱形杯子。 通常，实验包括测量界面在振荡应力下的响应。 该程序通过一致考虑界面和次相中的流体力学流动，利用扭矩/角位移幅度比和相位差来计算界面动态模量（或复数粘度）。 这是通过数值求解次相速度场的Navier-Stokes方程，以及在界面上的Boussinesq-Scriven边界条件和在其他地方的无滑动边界条件来实现的。 此外，该程序实现了通过求解转子扭矩平衡方程中的复数Boussinesq数而设计的新迭代方案。 显示英文摘要

摘要： BiconeDrag is a software package that allows one to perform a flow field based data processing of dynamic interfacial rheology data pertaining to surfactant laden air-fluid interfaces obtained by means of a rotational bicone shear rheometer. MATLAB and Python versions of the program are provided. The bicone fixture is widely used to transform a conventional bulk rotational rheometer into an interfacial shear rheometer. Typically, such systems are made of a bicone bob, which is mounted on the rheometer rotor, and a cylindrical cup. Usually, the experiment consists of measuring the response of the interface under an oscillatory stress. The program takes the values of the torque/angular displacement amplitude ratio and phase difference to compute the interfacial dynamic moduli (or complex viscosity) by consistently taking into account the hydrodynamic flow both at the interface and the subphase. This is done by numerically solving the Navier-Stokes equations for the subphase velocity field together with the Boussinesq-Scriven boundary condition at the interface, and no slip boundary conditions elsewhere. Furthermore, the program implements a new iterative scheme devised by solving for the complex Boussinesq number in the rotor's torque balance equation.