Influence Of Slip Effect Research Articles

Influence of slip effect on dynamic performance of miniature tilting-pad dynamic pressure gas bearing

Influence of slip effect on dynamic performance of miniature tilting-pad dynamic pressure gas bearing

Mechanism research of slip effect between frictional laminated beams

For laminated beams connected by Coulomb friction, interlayer slippage occurs when interfacial shear stress exceeds the resistant friction stress. Then, the physical properties of the laminated beams will change and may even cause structural damage. In this article, the law of interlayer slippage of laminated beams is obtained by mechanical derivation, and the finite element model is used for comparison verification. First, the internal shear force calculation formula of the laminated beam considering the interlaminar friction is derived from the segment micro-element method. Second, interlayer slippage laws of the frictional laminated beams in both horizontal and longitudinal direction are derived according to the hierarchical slip determination conditions. Third, according to the state quantity of different boundary conditions, the transfer matrix method is used to solve the longitudinal length of interlayer slip. Then, the design of the algorithm program is completed by MATLAB. Finally, based on the comparison between the finite element model calculation results and the calculation results of the algorithm program, the accuracy of the proposed method is verified. The analysis results indicate that slippage destroys the integrity of the laminated beam section and reduces the bending moment of inertia of the slip section of the beam. The influence of slip effect on the frictional laminated beams should be considered in deflection calculation.

The influence of slip effects on peristaltic transport of a Rabinowitsch fluid model in a non uniform tube

The present article deals with the Peristaltic flow of a Rabinowitsch fluid model is considered in a non uniform tube with slip effects. Wall properties analysis is also taken into account. Here the governing equations for Rabinowitsch fluid model are simplified by using long wavelength approximation and low Reynolds number and dynamic boundary conditions, analytical expressions have been obtained stream function, temperature profile, and velocity distribution. The effects of various physical parameters on stream function, temperature profile and velocity are analyzed through graphs and the results are discussed in detail.

Thermal Radiation Effect on 3D Slip Motion of Alcu-Water and Cu-Water Nanofluids over a Variable Thickness Stretched Surface

The current paper covers the examination of 3D nanofluid motion over a slendering expanding sheet under the influence of slip effect and thermal radiation. In this study, we considered the Cu-water and Al50Cu50-water nanofluids over a non-uniform thickness expanding sheet. With the help of similitude transformations, we changed the derived governed equations as ordinary differential equations. The mathematical outcomes determined by using Runge-Kutta and Newton’s methods. We reveal and interpret the graphs for different parameters of interest. We discussed the skin friction coefficient and reduced Nusselt number at different pertinent parameters. Results shown that the rate of heat transfer is higher in Al50Cu50-water nanofluid when compared with Cu-water nanofluid.

The combined effects of slip and convective boundary conditions on stagnation-point flow of CNT suspended nanofluid over a stretching sheet

In this article, we discussed the two dimensional stagnation-point flow of carbon nanotubes towards a stretching sheet with water as the base fluid under the influence of slip effects and convective boundary condition using a homogeneous model. Similarity transformations are used to simplify the governing boundary layer equations of nanofluid. This is the first article on the stagnation point flow of CNTs over a stretching sheet. Two types of CNTs, single- and multi-wall CNTs are used with water as the base fluid. The resulting nonlinear coupled equations with the relevant boundary conditions are solved numerically using the shooting method. The influence of the flow parameters on the dimensionless velocity, temperature, skin friction, and Nusselt numbers is explored and presented in the form of graphs and interpreted physically.

Numerical investigation of the structure of nonequilibrium three-dimensional hypersonic flow past blunt bodies

Three-dimensional dissociating air flow past blunt bodies is investigated within the framework of the parabolized Navier-Stokes equations in the thin layer approximation. Multicomponent diffusion, barodiffusion and homogeneous chemical reactions, including dissociation-recombination and exchange reactions, are taken into account. The boundary conditions are assigned in the free stream and at the surface of the body with allowance for heterogeneous catalytic reactions and slip effects. The problem of flow at zero angle of attack past blunt bodies possessing two planes of symmetry is investigated numerically for flow patterns varying from smeared layer structure to almost ideal flow (Re∞=50-105). The flow conditions corresponded to the motion of a body with lift along a re-entry trajectory [1]. The contribution of the chemical reactions in the shock wave as compared to the diffusion flux at the edge of the shock wave was estimated. The edge of the shock wave is assumed to correspond to the point at which the density profile has the greatest slope. The influence of slip effects and barodiffusion on the flow characteristics is demonstrated. The results of the calculations are compared with calculations based on the thin viscous shock layer model [2].