BACKGROUND A primary chondromyxoid fibroma (CMF) arising from sternum is quite uncommon tumor in thoracic surgery. Removal of giant sternal tumors requires extensive resection of the anterior chest wall, and results in deformity and paradoxical movement. CASE PRESENTATION A 40-year-old female presented a progressively enlarging mass of her anterior chest wall. Computed tomography revealed an ...

In this work two approaches against milk fouling in plate heat exchangers were investigated: (i) the temporary increase of the shear forces acting on the surface by superimposing an oscillating flow on the steady flow and thus increasing the mechanical flow forces and (ii) the modification of the energetic surface properties to reduce the adhesive strength between deposit and heat transfer surf...

We describe a simple method for estimating turbulent boundary layer wall friction using the fit of measured velocity data to a boundary layer model profile that extends the logarithmic profile all the way to the wall. Two models for the boundary layer profile are examined, the power-series interpolation scheme of Spalding and the Musker profile which is based on the eddy viscosity concept. The ...

In this paper, the effect of elliptical shape openings was numerically compared to the case when circular openings were used in the steel panel shear walls. At first, the finite element model in ABAQUS was calibrated by experimental results, obtained from previous studies. Then, three steel shear panels with different sizes of elliptical openings were analyzed under cyclic loads, and the result...

Time-wise velocity signals obtained from large-eddy simulation (LES) within the near-wall, logarithmic region of the zeropressure gradient, flat-plate turbulent boundary layer are used as input to a calibrated, empirical wall model to calculate the statistics of the fluctuating, wall shear stress τw. The results, together with those from numerical simulation and experiment indicate a log-variat...