We develop a fast multi-fidelity modeling method for very complex correlations between high- and low-fidelity data by working in modal space to extract the proper correlation function. apply this infer amplitude of motion flexible marine riser cross-flow, subject vortex-induced vibrations (VIV). VIV are driven an absolute instability flow, which imposes frequency (Strouhal) law that requires ma...

This paper investigates the integrated riser/vessel system which is subjected to random waves. Riser pipelines are the main components of the oil and gas offshore platforms. Whereas Iran country has been located on the fringes of Caspian Sea deep water, therefore study and research in this area is increasingly essential. The fluctuation of floating production causes the severe response and grea...

CFBs are widely used in the chemical, mineral, environmental and energy process industries. Several authors stressed the need for a clear identification of the different operation regimes in the riser of a CFB, to ensure a better comprehension of the hydrodynamic context, and thus better define the operation and design parameters.. First approaches to develop a "work map" of the riser operation...

As oil and natural gas production continue to go deeper into the ocean, flexible riser, as a connection surface of marine channel, will confront greater problems in its practical application. Composite materials are being considered replace steel unbonded pipe order successfully meet lightweight high-strength criteria ultra-deep-water production. The carbon-fiber-reinforced material substitutes...

This paper described the discovering process of some shortcomings of the conventional fluid catalytic cracking (FCC) process and the proposed two-stage riser (TSR) FCC process for decreasing dry gas and coke yields and increasing light oil yield, which has been successfully applied in 12 industrial units. Furthermore, the multifunctional two-stage riser (MFT) FCC process proposed on the basis o...

Optimum casting designs are unreliable without consideration of the statistical and physical uncertainties in the casting process. In the present research, casting simulation is integrated with a general purpose reliability-based design optimization (RBDO) software tool previously developed at the University of Iowa. The RBDO methodology considers uncertainties in both the input variables as we...

Now a days, significant amount of aluminium alloy are being used to fabricate components such as engine blocks, cylinder heads, suspension control arms, wheels and pistons. In response to consumer demands for the increase in performance, the use of aluminium has grown dramatically in the recent years. So in order to produce a sound LM6 (Al-12%Si) Aluminium alloy casting, a new approach is made ...

The sewage diffusion effect under deep water was carried out between different diffuser design parameters based on the hydraulic model test. According to test of length, riser spacing, number, nozzle horizontal azimuth angle and jet angle, specific need be determined comprehensively considering surface field, degree, project cost, etc. We used a coastal marine disposal in China as an example. a...