In the present study, the conjugate turbulent free convection with the thermal surface radiation in a rectangular enclosure bounded by walls with different thermophysical characteristics in the presence of a local heater is numerically studied. The effects of surface emissivity and wall materials on the air flow and the heat transfer characteristics are the main focus of the present investigati...

Dimensional scaling laws are developed as an approach to understanding the energy dependence of high energy scattering processes at fixed center-ofmass angle. Given a reasonable assumption on the short distance behavior of bound states, and the absence of an internal mass scale, we show that at large s and t, do/dt (AB -t CD) Q s -n-i-2 f(t/s); n is the total number of fields in A,B,C and D whi...

The linear momentum transfer occurring in central heavy ion collisions is studied within the Landau Vlasov model. A sensitivity to the Equation Of State is found for this observable. Assuming the free nucleon-nucleon cross section, a soft compressibility modulus (around 210 MeV) is required to reproduce the large amount of data available for linear momentum transfer. This result stands for loca...

Membrane scattering in m(atrix) theory is related to dynamics in three-dimensional SU(2) gauge theory, with transfer of p11 being an instanton process. We calculate the instanton amplitude and find precise agreement with the amplitude in eleven dimensional supergravity.

Conservation of angular momentum is a familiar tenet in science but has seldom been invoked to understand (or predict) chemical processes. We have developed a general formalism based on Wigner's original ideas concerning angular momentum conservation to interpret the photo-induced reactivity of two molecular donor-acceptor assemblies with physical properties synthetically tailored to facilitate...

A series of one-dimensional studies is presented to reveal basic aspects of momentum and energy transfer to plates in air blasts. Intense air waves are initiated as either an isolated propagating wave or by the sudden release of a highly compressed air layer. Wave momentum is determined in terms of the energy characterizing the compressed layer. The interaction of intense waves with freestandin...

Dynamical contraction of a slowly-rotating magnetized cloud is studied using the magnetohydrodynamical (MHD) simulations. In the isothermal stage (n ∼ < nA ∼ 10 cm), the cloud evolves similarly to that expected from Larson-Penston self-similar solution and experiences the run-away collapse. However, after the central density exceeds ∼ nA, an accretion disk is formed around the adiabatic core. J...

t An analysis is carried out to extract the leading effective trajectories and residues in pp and n-p elastic scattering. The results are compared with the predictions of the constituent interchange model and the logarithmic dual model, which are shown to be the only two types of theory capable of providing a uniform link between backward and forward Regge regions and the fixed angle region. Th...

Recent improvements of the hard scattering picture for the large p⊥ behaviour of electromagnetic form factors, namely the inclusion of both Sudakov corrections and intrinsic transverse momentum dependence of the hadronic wave function, are reviewed. On account of these improvements the perturbative contributions to the pion’s and the nucleon’s form factor can be calculated in a theoretically se...