Pipe dreams represent permutations pictorially as a series of crossing pipes. Recent applications of pipe dreams include the calculation of Schubert polynomials, fillings of moon polyominoes, and in the combinatorics of antidiagonal simplicial complexes. These applications associate pipe dreams to words of elementary symmetric transpositions via a canonical mapping. However, this canonical mapp...

An extensive product range is mandatory to be a key player in the pipe insulation market. The polyurethane preinsulated pipe producers are responding to global opportunities by diversifying their activities into industrial, marine, oil and gas applications. Moreover, the requirements for traditional district heating preinsulated pipes including initial thermal conductivity and its ageing perfor...

Viscous fluid exiting a long horizontal circular pipe develops complex structure comprising primary jet above and smaller secondary below with thin curtain connecting them. We present here combined experimental, theoretical numerical study of this 'Torricelli's curtain' phenomenon, focusing on the factors that control its morphology. propose model for in which particle trajectories result from ...

Maximizing the transfer performances of heat and mass exchangers is a major target for process intensification purposes. Basically, flux enhancement can be achieved through increased specific surface area and/or coefficients (e.g. Dean vortices generation in curved pipes), but this has to balanced energy requirement. In study, novel performance criteria taking into account both effects associat...

In the present paper, a three dimensional annular developing incompressible laminar flow through 270- degree curved pipe is numerically simulated. The dimensionless governing equations of continuity, momentums and energy are driven in toroidal coordinates. The governing equations are discretized by projection algorithm using forward difference in time and central difference in space. A three-di...

The adoption of Health IT has been argued to bring about improvements in adopting hospitals. However, examining a panel of hospitals for the adoption of IT, we find that close to 50% of hospitals that adopt a health IT system go on to stop using it during the duration of our panel.1 We find that smaller hospitals and hospitals that are located in areas that have low IT-Intensity are more likely...

Mechanical snubbers and inertia mass dampers are known as vibration control devices that have elements generate the inertial resistance force. By adding with to piping systems, we aim reduce various responses of systems subject seismic disturbances. In this study, propose a design method optimize parameters installed on system is modelled by 3-dimensional beam finite element model some tangent ...

The enormity of the problem of deteriorating pipeline infrastructure is widely apparent. Since a complete rebuilding of the piping system is not financially realistic, municipal and utility operators require the ability to monitor the condition of buried pipes. Thus, reliable pipeline assessment and management tools are necessary to develop long term cost effective maintenance, repair, and reha...