Folding simulations of β-hairpin and α-helix bundle proteins with varied surface tension coefficients embedded in a popular SA model were performed to reveal the effects of implicit modeling of nonpolar solvation on protein folding.
We compute trajectories of fluid particles in a water wave that propagates with a constant shape at a constant speed. The Stokes drift, which asserts that fluid particles are pushed forward by a wave, is proved using a new method. Numerical examples with various gravity and surface tension coefficients are presented.
The effects of positive and negative surface tension coefficients (∂σsur∕∂T) on both laminar and turbulent weld pool convection are numerically studied for a typical gas tungsten arc welding (GTAW) process. Three-dimensional turbulent weld pool convection in a pool is simulated using a suitably modified high Reynolds number k‐ε model in order to account for the morphology of an evolving solid-liquid interface. Key effects of the sign of surface tension coefficient (∂σsur∕∂T) on the turbulent transport in a GTAW process are highlighted by comparing the turbulent simulation results with the corresponding ones from a laminar model, keeping all other process parameters unaltered. A scaling analysis is also performed in order to obtain order-of-magnitude estimates of weld pool penetration for both positive and negative surface tension coefficients. The scaling analysis predictions are in good agreement with the numerical results, in an order-of-magnitude sense.
SynopsisWe consider a generalisation of the liquid drop problem, introduced in [1, Part II], by allowing the upper and lower surfaces to have different surface tension coefficients γv and γu. We study the existence, uniqueness and regularity of this problem. In addition, we show that as γv/γu →0, the solution of this problem converges to the solution of the “plasma problem”.
FORMULA FOR CALCULATING THE COMPLETE EVAPORATION TIME OF AEROSOL DROPS WITH ALLOWANCE FOR THE EVAPORATION AND SURFACE TENSION COEFFICIENTS