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Start Over Coverage 323-333

1. On the 2D-validation study of the atmospheric boundary layer flow model including pollution dispersion

Creator:
Sládek, Ivo, Kozel, Karel, and Jaňour, Zbyněk
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
boundary layer flow and pollution dispersion
Language:
English
Description:
The paper deals with a flow validation study performed using our in-house 3D-computer-code which implements mathematical and numerical model capable to simulate the atmospheric boundary layer flow in general. The validation study is related to a neutrally stratified boundary layer 2D-flow over an isolated hill with a rough wall including pollution dspersion according to Castro [1]. Our mathematical model is based on the system of RANS equations closed by two-equation high-Reynolds number k-ε turbulence model together with wall functions. The finite volume method and the explicit Runge-Kutta time integration method are utilized for the numerics. and Obsahuje seznam literatury
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

2. Oscillation of unstable second order neutral differential equations with mixed argument

Creator:
Džurina, Jozef and Pirč, Viktor
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
neutral equation and mixed argument
Language:
English
Description:
The aim of this paper is to present new oscillatory criteria for the second order neutral differential equation with mixed argument (x(t) − px(t − τ ))'' − q(t)x(σ(t)) = 0. The results include also sufficient conditions for bounded and unbounded oscillation of the equations considered.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public