In this paper we prove two results about the inviscid limit of the NavierStokes system. The first one concerns the convergence in H of a sequence of solutions to the Navier-Stokes system when the viscosity goes to zero and the initial data is inH. The second result deals with the best rate of convergence for vortex patch initial data in 2 and 3 dimensions. We present here a simple proof which a...

We investigate the uniform regularity and zero kinematic viscosity-magnetic diffusion limit for incompressible viscous magnetohydrodynamic equations with Navier boundary conditions on velocity perfectly conducting magnetic field in a smooth bounded domain ? ? ?3. It is shown that there exists unique strong solution to finite time interval which independent of viscosity coefficient diffusivity c...

Based on different fuel injection strategies, this paper analyzes the factors such as engine original emission smoke, exhaust temperature, soot content, wear spot diameter and kinematic viscosity. The study found that delaying timing, increased afterburn, emissions, gas temperature increase, but will increase thermal load of parts. At same time, growth rate lubricant viscosity increased; at con...

Due to the high price of virgin vegetable oils and the drawbacks of the homogeneous catalytic transesterification, in this work an economically profitable alternative process was proposed for biodiesel synthesis in which transesterification of the low-cost waste cooking oil (WCO) with methanol in a heterogeneous system was done. Alumina impregnated with sodium hydroxide was utilized as a solid ...

Abstract The transformers oil acts as an insulation well cooling liquid of a transformer. It is very important that the transformer maintained so properties are preserved with time. Petroleum-based mineral widely used in due to its excellent insulating qualities and low cost despite its’ non-biodegradable hazardous property. This paper seeks find alternative by using palm based nanofluids at lo...

The objective of this study is to design and characterize a piezoelectric composite and evaluate its suitability for viscosity-measuring applications, i.e., monitoring the coagulation rate of blood. The composite is manufactured of a platinum-core lead zirconate titanate (PZT) fiber inserted into an aluminum matrix. This study characterizes the described composite by testing its impedance, capa...