Relativistic Contact-Wall Effects at Start-up
Journal Title: INCAS BULLETIN - Year 2019, Vol 11, Issue 2
Abstract
General relativity describes the physical force of gravity and its relation with the space-time structure. The fundamental physical insight behind the theory of general relativity is that the effects of acceleration cannot be distinguished from those of gravity. The presence of matter changes the geometry of space and acceleration is experienced in relation to that geometry. In particular, the geometry of space and time is dynamically governed by physical laws that are not independently given. Such a case is the fluid turbulence which remained unexplained for over fifty years within the framework derived from the classical Navier-Stokes theory. The physical and mathematical problem of the genuine turbulence remains an unsolved one. This paper considers the turbulence as a manifestation of non-Newtonian behavior induced by the gravity-like accelerations at the beginning of motion. The fluid particles with high accelerations exhibit in wall-bound flows with large Reynolds number a sort of structure-less, background turbulence. It is shown that the relativistic viewpoint may solve the present paradigmatic crisis of turbulence.
Authors and Affiliations
Horia DUMITRESCU, Vladimir CARDOS, Radu BOGATEANU, Alexandru DUMITRACHE
Keywords
Related Articles
- EP ID EP585271
- DOI 10.13111/2066-8201.2019.11.2.7
- Views 80
- Downloads 0
INCAS SUBSONIC WIND TUNNEL
The INCAS Subsonic Wind Tunnel is a closed circuit, continuous, atmospheric pressure facility with a maximum speed of 110 m/s. The test section is octagonal ,of 2.5 m wide, 2.0 m high and 4 m long. The tunnel is powered...
A Linear Analysis of a Blended Wing Body (BWB)Aircraft Model
In this article a linear analysis of a Blended Wing Body (BWB) aircraft model is performed. The BWB concept is in the attention of both military and civil sectors for the fact that has reduced radar signature (in the abs...
EVAPRED - A CODE FOR FATIGUE ANALYSIS OPTIMIZATION
The fatigue can be, in fact, defined as: “failure under a repeated or otherwise varying load, which never reaches a level sufficient to cause failure in a single application”. Physical testing is clearly unrealistic for...
[b]Equipment for testing the indications accuracy of speedometers and altimeters existing on board aircraft and the tightness of the related pneumatic paths[/b]
The equipment is intended to testing the tightness of the catchment pneumatic system (Pitot tube), the transmission (pneumatic paths) and the total and static air pressures processing (aircraft-type instruments) in order...
Multifunctional composites and nanocomposites with applications in the aerospace industry
Polymer nanocomposites (PNCs) ,namely, nanoparticles dispersed in a polymer matrix, have garnered academic and industrial interest since 1990. This is due to the very attractive properties of nanostructurated fillers, a...