Measuring flow rate precisely in laminar flow has been a difficult task, especially when utilizing a Coriolis mass flow meter (CMFM) for low flow rate measurements. The meter often under reads the mass flow rate, making it less useful in these conditions. The dominant factor affecting the CMFM's performance in laminar regions is secondary flow, which overshadows the generated Coriolis force, leading to an under-reading of flow rate. Previous studies have indicated that tube curvature is the most significant parameter affecting secondary flow generation and the overall performance of the meter. An omega-shaped tube configuration featuring a continuous curvature has been identified as the optimal shape for maximizing a CMFM device’s performance in laminar flow. The purpose of the investigation is to study and compare the efficiency of various Omega tube designs that have undergone slight geometric alterations. Four different configurations were evaluated for maximum time lag by vibrating at their respective natural frequencies and keeping the sensor position along the centerline of the tube configuration.

Coriolis mass flow meters are one of the most accurate tools to measure the mass flow in the industry. However, two-phase mode (gas-liquid) may cause severe operating difficulties as well as decreasing certitude in measurement. This paper presents a method based on fuzzy systems to correct the error and improve the reliability of these sensors in the presence of two-phase model fluid. Definite available flow meter parameters are given to designed fuzzy system as inputs, and error is estimated as its output. In the proposed method, to decrease the number of rules, data are clustered using K-means clustering algorithm. The ability of this method in error correction is shown by testing it on real experimental data and compared with the least square method.

The moving blades in a circular path have many industrial applications, in more modern turbo machines, such as jet engine compressors, the flow conditions are completely incompressible. On the other hand, the 2D study of the flow around these blades, which shows many characteristics of the flow and simplifies the matter, is usually unavoidable. In this regard, the simulation methods LES and RANS, in order to simulate the flow around the NACA0012 airfoil, different modes of fixed and rotating airfoil with different angles of attack and 3D impeller mode have been implemented. The lift coefficient, drag coefficient, torque, and mass flow of S-A, RNG, SST, RSM, and LES models are compared. The net mass rate will be different in the above methods. In RANS methods, the value of the net mass rate is negative; that is, loss of mass rate occurs, but in the LES method, the value of the net mass rate is positive. The highest net mass rate is related to the LES method, and in RANS models, the reverse flow is observed. According to the results, the effects of body forces in energy equation or thermal dissipation under circular motion are important in comparison with experimental data. A comparison of fixed and rotating airfoil lift coefficient diagrams with the LES model shows that the lift coefficient in a fixed airfoil is two times relative to a rotating airfoil. Also, the torque on the impeller, compared with different turbulent models, varies from  88381 to 172116.

In this study, a collisional quantum plasma, consisting of positively charged inertial non-degenerate ions and inertialess degenerate electrons, is considered in the presence of the spatially varying magnetic field. The excited nonlinear wave propagation due to changes in the magnetic field and Coriolis force is investigated using the fluid model. The differential equation governing the propagation of ion-acoustic solitons is obtained by the reductive perturbation method. This is a modified Korteweg–de Vries–Burgers differential equation where Burger dissipation and collision terms are derived from spatial changes of the magnetic field, the collision of ions with neutral particles, and the effect of Coriolis force. Results of the numerical analysis indicate the combined effect of the magnetic field, the collision of ions with neutral particles, and Coriolis force on the behavior of the ion-acoustic mode causes oscillating and radiating pulses behind the soliton propagation. This equation is converted into the quantum ion-acoustic equation by eliminating spatial changes of the magnetic field and Coriolis force as well as collision of ions with neutral particles.

Effects of Hall current, ion-slip and Coriolis force on unsteady MHD Couette-Hartmann flow of a viscous incompressible electrically conducting fluid through a porous medium bounded by porous plates in the presence of a uniform transverse magnetic field which is either fixed relative to the fluid or to the moving porous plate is investigated using Laplace transform technique. The expressions for the fluid velocity and shear stress at the moving porous plate are also derived. In order to analyze the physical significance and characteristic features of the problem, the graphs for velocity distribution and shear stress distribution at the moving porous plate are generated for different values of non-dimensional parameters. It is observed that the fluid velocity when magnetic field is fixed relative to the moving porous plate is always more than the fluid velocity when magnetic field is fixed relative to the fluid while the shear stress at the moving porous plate when magnetic field is fixed relative to the moving porous plate is always less than the shear stress at the moving porous plate when magnetic field is fixed relative to the fluid.

The blades moving in a circular path have many industrial applications, these include their use in some turbomachines. In more modern turbo machines, such as jet engine compressors, the flow conditions are completely incompressible. On the other hand, 2-D study of the flow around these blades, which shows many characteristics of the flow and to simplify the matter, it is usually unavoidable. In this regard, the simulation method LES and RANS in order to simulate the flow around the NACA0012 airfoil, different modes of fixed and rotating airfoil with opposite attack angle and 3-D impeller mode have been implemented. Lift coefficient, drag coefficient, torque and mass flow of S-A, RNG, SST, RSM and LES models are compared. Among the turbulence methods, the best result for Lift coefficient, drag coefficient and torque coefficient and mass flow of LES method is obtained. In according to, adding "the work of centrifugal forces and Coriolis acceleration" to Momentum equation, a better and more accurate convergence has been achieved compared to the works of others.

Coriolis Vibratory gyroscopes are one of the most modern types of gyros that has taken the common gyroscopes residence with some difference in the test mass design and elastic suspension test. According to the important features observed in the capacitive excitation of the actuators regarding the piezo-electric actuators, the operation principles and their formulation are completely changed, which require both two dimensional and finite element analysis to evaluate their optimal performance. Due to the sensors are usually vibrating continuously while operation, in this paper a general formulation is presented so that it can fully describe the influence of the parameters related to different frequency operating modes. The main idea of the vibration gyroscope is to replace the rotational rotor with a vibrational structure and to use the effect of Coriolis force, which causes the secondary motion of a sensitive mass to match an angular velocity. In this paper, the analysis of the sensitivity of hemispherical vibrational gyroscopes is discussed. The electrodes location variation, the sensed voltage around the resonance frequency and pick-off/forcer materials will also be investigated. Finally, the results of simulated resonance frequencies are compared and validated with the theoretical principles.

In this research, in order to investigate the effect of the piezoelectric patch which is used as a sensor or actuator in rotating flexible structures such as a helicopter blade, the free vibrations of the rotating rectangular sheet with and without the piezoelectric patch have been presented. First-order shear deformation theory is considered for plate displacement and piezoelectric field. Considering the effect of Coriolis acceleration, centrifugal acceleration and centrifugal in-plane forces, the equations of motion are derived from Hamilton's principle and the electromechanical couple equation is obtained from Maxwell's equation. For piezoelectric, two electrical conditions, open circuit and closed circuit, which are used in sensors and actuators, respectively, have been considered. The equations are discretized with the help of the numerical method of generalized differential squares and the matrices of inertia mass, eccentricity, Coriolis and stiffness matrix are obtained. Natural frequency values for beam and rotating plate have been compared in Abaqus software. Also, the values obtained from the numerical solution in MATLAB have been verified with articles and ABAQUS, which have high accuracy. The effect of parameters such as hub radius, rotation speed, sheet thickness, aspect ratio, piezoelectric patch thickness and applied voltage on the natural frequency of the system has also been investigated.