This paper presents a numerical simulation of the developing flow and heat transfer of a viscoelastic fluid in a rectangular duct. In fully developed flow of a viscoelastic fluid in a non-circular duct, secondary flows normal to the flow direction are expected to enhance the rate of heat and mass transfer. On the other hand, properties such as viscosity, thermal conductivity, specific heat and ...

Abstract Background For adolescents, preventing a premature training termination (PTT) and withdrawal from education after PTT is an important societal task. While studies reveal that early-risk factors such as low educational background or selected personality constructs are relevant for predicting PTT, less known about subsequent trajectories the determine them. Methods Using data German Nati...

We give several examples to show that PA1 and IND-CCA2 together do not guarantee PA2 in the absence of random oracles, for both statistical and computational PA. In the statistical case, we use the Desmedt-Phan hybrid encryption scheme as the first example. If the DEM of the Desmedt-Phan hybrid encryption is an IND-CCA2 symmetric encryption without MAC, then the Desmedt-Phan hybrid is INDCCA2 a...

In 111 lupus patients we compared the potential of the IgG and IgM anticardiolipin antibody (ACA) enzyme linked immunosorbent assay (ELISA) and four different lupus anticoagulant (LAC) assays (partial thromboplastin time (PTT) of a 1:1 mixture of patient and control plasma with phospholipids from animal (PTT-st) or human brain (PTT-HB); PTT with dilutions of human brain phospholipids (PL diluti...

One of the most classical closures approximation of the FENE model of polymeric flows is the one proposed by Peterlin, namely the FENE-P model. We prove global existence of weak solutions to the FENE-P model. The proof is based on the propagation of some defect measures that control the lack of strong convergence in an approximating sequence. Using a similar argument, we also prove global exist...