Coriolis acceleration

Coriolis Acceleration The Coriohs acceleration arises in a rotating frame, which has no parallel in an inertial frame. When a body moves at a linear velocity u in a. rotating frame with angular speed H, it experiences a Coriolis acceleration with magnitude ... 

The Coriolis veclor lies in the same plane as the velocity vector and is perpendicular to the rotation vector. If the rotation of the reference frame is anticlockwise, then the Coriolis acceleration is directed 90° clockwise from the velocity vector, and vice versa when the frame rotates clockwise. The Coriolis acceleration distorts the trajectory of the body as it moves rectilinearly in the rotating frame. 

This chapter presents a physical description of the interaction of flames with fluids in rotating vessels. It covers the interplay of the flame with viscous boundary layers, secondary flows, vorticity, and angular momentum and focuses on the changes in the flame speed and quenching. There is also a short discussion of issues requiring further studies, in particular Coriolis acceleration effects, which remain a totally unknown territory on the map of flame studies. 

Thus, the maximum value of the Coriolis acceleration is at the cold flame boundary, which can be given as... 

Coriolis acceleration effects in a combustion chamber (dia 90 and width 30mm), vented at the periphery through four orifices, having 7.5 mm in diameter, 4% propane/air mixture, rotation speed (a) lOOOrpm and (b) 2000rpm. 

LNG dispensers are very similar to CNG dispensers in function their primary purpose is to meter and control the flow of LNG to the vehicle. Like CNG dispensers, LNG dispensers do not include a pump. The meters inside LNG dispensers are typically of the Coriolis acceleration type that have low flow restriction... 

This is the Coriolis acceleration, which is imposed on particles moving in a rotating reference frame—e.g., liquids on a rotating surface or winds in the earth s atmosphere. The resultant acceleration experienced by a particle is a combination of the radial and tangential components, making an angle to the radius,... 

In each case, if the additional force is not applied to keep the parcel traveling in a straight path relative to the disk, the parcel will experience an acceleration of magnitude F/m with respect to the disk this is the Coriolis acceleration. For this direction of disk rotation, the Coriolis acceleration is always to the right of the direction the parcel travels relative to the disk, and is always of magnitude 2cov. 

Fig. 7.2.2 Segment of Fig. 7.2.1 the mass Mn oscillates radial to the pivot S with the frequency coD yaw rate Qz d2-dn=working stroke ar, Coriolis acceleration at, radial acceleration vt, tangential speed... 

The Coriolis acceleration is directly available as a voltage signal. 

Fig. 7.2.8 Sil icon micromachined yaw-rate sensor with electromagnetic drive 1, coupling spring 2, magnet 3, oscillating direction 4, oscillating mass 5, acceleration sensor 6, direction of Coriolis acceleration 7, spring to...

The application of yaw-rate sensors in vehicles requires particular attention. The dynamic requirements for the sensors are high Coriolis accelerations in the range of milli-g must be detected correctly, and at the same time the accelerations occurring in the range of several g must not interfere with the sensor function (such as when driving over potholes). In the case of the roll-over sensor this even applies for accelerations > 30 g, such as in a crash. 

Scale analysis of the primitive momentum equations, (3.23a,b), reveals that, for typical wind speeds and spatial scales observed in the atmosphere, the time derivative and curvature terms in these equations are small compared to the pressure gradient and Coriolis accelerations (see Holton, 1992, for details). In particular, if we scale the time derivative term in equation (3.23a) as follows ... 

In today s industrial applications, Coriolis mass flowmeters are widely used by process engineers to monitor mass flow rate. This meter measures the Coriolis force that depends on the mass momentum of the flow, and, in principle, it can be applied to both single- and mixed-phase flows. Magnetic or optical detectors are generally used to detect mass-flow-related Coriolis acceleration. A brief description of the Coriolis flowmeter will be presented because it is widely used in industrial processes. 

Because we are interested only in processes taking place on limited spatial and temporal scales over which the air motion is not influenced by the rotation of the Earth, we will neglect the Coriolis acceleration (see Chapter 21) and write the equation of motion of a compressible, Newtonian fluid in a gravitational field as... 

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