A simple and e€ective numerical method is proposed for simulating the temporal di€usive mass transport process through a microstructure with arbitrary complexity described by a phase-®eld approach. The mass di€usion through a given microstructure is modeled by a di€usion equation with a variable di€usion coecient, which is solved by an ecient and accurate semi-implicit spectral method. It is ...

A constitutive model is derived from theory of elasticity for predicting ultimate drying shrinkage of concrete. The model was extended by incorporating the semiempirical composite model proposed by Hirsch and Dougill for predicting Young's modulus of concrete. Their composite model is the geometric mean of Paul's upper and lower limit boundaries of a twophase composite. According to the shrinka...

Recent advances in wireless communication technology have made dynamic file allocation in mobile networks an important issue. In particular, our objective in this paper is to provide reliable and real-time information services in mobile computing environments. We have proposed a twophase dynamic file allocation strategy to best satisfy the critical reliability and query response time requiremen...

An experimental investigation was conducted to simultaneously measure the instantaneous velocities of large particles and air in two-phase flow using Laser Doppler Velocimeter. Measurements at two Photo-Multiplier voltage settings are used to separate the signals from the small seeding particles that trace the air flow and the suspended solid particle based on the difference of scattered light ...

Liquid explosions, generated by rapid egassing of strongly supersaturated liquids, have been investigated in the laboratory with a view to understanding the basic physical laX•sses operating during bubble nucleation a d growth and the subsequent behavior fthe expanding two-phase flow. Experimenkq are carried out in a shock tube and ,me monitored by high-speed photography and pressure trm•sducer...

Dr. L. Wei, X. Wang, Y. Yuan, S. Zhai, Prof. Y. Chen School of Chemical and Biomedical Engineering Nanyang Technological University 62 Nanyang Drive , Singapore 637459 , Singapore E-mail: [email protected] Dr. B. Liu, H. Gui, Prof. C. Zhou Ming Hsieh Department of Electrical Engineering Viterbi School of Engineering University of Southern California Los Angeles, CA 90089-0271 , USA E-mail: ch...

in the present work, an engineering method is developed to predict laminar and turbulent heating-rate solutions for blunt reentry spacecraft at hypersonic conditions. the calculation of aerodynamic heating around blunt bodies requires alternative solution of inviscid flow field around the hypersonic bodies. in this paper, the procedure is of an inverse nature, that is, a shock wave is assumed a...

We report the design and the electrical and microfluidic characterization of a device that improves signal strength and increases the detection levels in microfluidic impedance cytometry. Low-conductivity aqueous and two-phase dielectric sheathing allows the use of wider, more easily fabricated channels, increases the precision of celland particle-size measurements, and decreases the smallest d...

We recently discovered 5 new putative globally optimum configurations for Morse clusters at ρ = 8. This report contains some algorithmic details as well as the structures determined with our method. Methodology After the success obtained in solving minimum energy conformation problems for Lennard-Jones clusters (see [LS02] and [LS03]) we recently adapted our twophase monotonic basin-hopping str...