In machining industry, cutting fluids have an important role due to their lubrication, cooling and chip removal functions. Using of cutting fluids can improve machining process efficiency, tool life, surface quality and it can reduce cutting forces and vibrations. However, health and environmental problems are encountered with the use of cutting fluids. Therefore, there has been a high demand f...

(paper pages 133-156) zagros active fold-thrust belt lies on the northern margin of the arabian continental crust it is a young fold-thrust mountain belt currently shortening, thickening and uplifting as a result of the collision of the arabian and iranian plates. rethickening of crust during collisional orogenies could have been carried out by reversal of fault motion along the mesozoic normal...

X-ray computed tomography (CT) is a promising tool that yields data useful for understanding the fine-scale density structure of partly lithified and tectonically deformed sediments. We conducted 21 CT scans of ODP Leg 131 sediments, including whole-round cores and thin-section chips, obtained from the toe of the Nankai accretionary prism. The samples range from highly deformed pieces from the ...

We simulate dynamic ruptures on a strike-slip fault in homogeneous and layered half-spaces and on a thrust fault in a layered half-space. With traditional friction models, sliding friction exceeds 50% of the fault normal compressive stress, and unless the pore pressures approach the lithostatic stress, the rupture characteristics depend strongly on the depth, and sliding generates large amounts...

The flowfield of a magnetoplasmadynamic thruster was simulated numerically and the results compared to experimental measurements, in order to validate the code and obtain insight into underlying physical processes. The thruster chosen was the full-scale benchmark thruster, because it has been the subject of many experimental studies. The parallelized axi-symmetric code featured detailed physica...

A numerical study is conducted to understand the impact of an unsteady freestream on aerodynamic performance oscillating airfoil. The flow environment generated by placing a stationary inline circular cylinder array upstream dependence thrust with variation Reynolds numbers and Strouhal investigated, it revealed that enhances production pitching This increased was related effective increase in ...

While NASA’s current next-generation launch vehicle research has largely focused on advanced allrocket single-stage-to-orbit vehicles (i.e. the X-33 and it’s RLV operational follow-on), some attention is being given to advanced propulsion concepts suitable for “next-generation-and-a-half” vehicles. Rocketbased combined-cycle (RBCC) engines combining rocket and airbreathing elements are one cand...

An undulatory pattern of body bending in which waves pass along the body from head to tail is a major mechanism of creating thrust in many fish species during steady locomotion. Analyses of live fish swimming have provided the foundation of our current understanding of undulatory locomotion, but our inability to experimentally manipulate key variables such as body length, flexural stiffness and...

Collective wind farm flow control, where turbines are operated in an individually suboptimal strategy to benefit the aggregate farm, has demonstrated potential reduce wake interactions and increase energy production. However, existing models used for control often estimate thrust power of yaw-misaligned using simplified empirical expressions that require expensive calibration data do not extrap...