A novel numerical technique for simulating interfacial gravity waves is considered. The model comprises an immiscible, binary fluid lattice Boltzmann model incorporating a gravitational interaction and simulates two immiscible, viscous fluids of different densities with a sharp interface between them. The model is described and the accuracy of the technique is considered. Simulation results are...

We study the stochastic response of a nanomechanical resonator in a liquid connected to a feedback loop to increase the quality Q factor. We distinguish two regimes in the oscillation. Below a critical value of the feedback gain, an effective increase of the Q factor and temperature is produced. When the gain surpasses the critical value, the resonator initially behaves as having negative dampi...

The oscillatory behavior of CNT oscillators, initially subjected to bending, is studied under constant temperature using molecular dynamics simulations. We constrain the rotational motion of the inner CNT by imposing a small bending deformation to the initial structure. Our observation suggests that this constraint does not enhance the oscillation stability of CNT oscillators. However, oscillat...

Background and Objectives: Virtual inertia control, as a component of a virtual synchronous generator, is used for the implementation of synchronous generator behaviour in microgrids. In microgrids that include high-capacity distributed generation resources, in addition to virtual inertia, virtual damping can also lead to improvement of frequency stability of the microgrid. The purpose of the c...

The interline power flow controller (IPFC) can control the active and reactive of different lines in system. To utilize flexible ability IPFC increase damping characteristic its AC system, this paper proposes a low-frequency oscillation (LFO) suppress method through IPFC. LFO is designed by adding supplementary signals to outer current loop In addition signals, are also added related loop, whic...

Oscillation eigenmodes are studied for a planar solar model with a non-uniform horizontal magnetic field in the atmosphere. The three layer atmospheric model is the same as in Tirry et al. (1998). The analysis in that paper is extended to a wide range of parameters. Different types of oscillation modes are determined for a wide range of the magnetic field strength and for different degrees of t...

The results of experiments on the threshold behavior and large-amplitude oscillation of "outward-swinging door" vibrating flap valves in an air environment are reported and compared with the predictions of a simple nonlinear theory that parametrizes aerodynamic effects by means of a simple damping coefficient together with a contraction coefficient for the flow. The agreement is acceptably good...

This paper investigates and compares performance of various conventional and fuzzy logic based controllers at generator locations for oscillation damping. Performance of combination of conventional and fuzzy logic based controllers also studied by comparing overshoot on the active power deviation response for a small disturbance and damping ratio of the critical mode. Fuzzy logic based controll...