Elena Ivancha

Marine Hydrophysical Institute RAS · Department of Numerical technologies & Mathematical Modeling

This work is focused on numerical simulation of the interaction of a solitary surface wave with a submerged rectangular breakwater in the constant depth model basin using the non-hydrostatic hydrodynamic model SWASH (Simulating WAves till SHore). The features of the transformation of a wave passing over an obstacle with the width and height changes...

The importance of studying local features of changes in sediment granulometric composition and the coastal zone relief dynamics on the coastal areas of the Western Crimea is increasing due to the active exploitation of the region recreational potential. A series of numerical experiments was carried out to study the mechanism of storm redistribution...

Results of Balaklava Bay (Crimean Peninsula, Black Sea) seiches numerical modelling are presented. ADCIRC hydrodynamic model is used for simulations. Balaklava Bay is represented by an unstructured triangular finite elements mesh with ∼10 m spatial resolution. Periods of first four modes of free oscillations has been obtained by means of energy dep...

Studies of shape dynamics of the Bakalskaya Spit based on observation and numerical simulation are carries out. The Bakalskaya Spit is a dynamically active sand formation on the north-west coast of the Crimea Peninsula. Field observations and satellite image analyses showed that the erosion of spit west coast, eastward displacement of spit distal p...

Studies of shape dynamics of the Bakalskaya Spit based on observation and numerical simulation are carries out. The Bakalskaya Spit is a dynamically active sand formation on the north-west coast of the Crimea Peninsula. Field observations and satellite image analyses showed that the erosion of spit west coast, eastward displacement of spit distal p...

An effectiveness of the storm wave attenuation by protective piers in the Sevastopol Bay of the Black Sea is studied on the basis of numerical simulation using the SWAN spectral model. Analyzed are the parameters of waves generated by winds of four main directions as well as by the southern cyclone during the storm on November 11, 2007. It is obtai...

Numerical simulation of wind waves in the bays of south-west part of the Crimea Peninsula is carried out with high space resolution. Particular attention is paid to the local characteristics of wind waves in the Sevastopol Bay. The parallel version of wind wave spectral model SWAN is implemented. The steady state waves caused by wind of different d...

Processes of roiling, transport-diffusion, and deposition of fine disperse bottom sediments are studied in the northwestern shelf of the Black Sea in different synoptic situations connected with the passage of cyclones. Movement of atmospheric disturbances with velocities of 5 and 15 m/s along three trajectories typical of this region is considered...

The processes of roiling of the bottom sediments, diffusion transport of the suspension, and its repeated sedimentation on the northwest shelf of the Black Sea caused by a moving cyclone are studied by using a numerical sigma-coordinate model. It is supposed that bottom sediments are formed by particles of the same type. We determine the regions of...

A numerical sigma coordinate system is used to study the transformation of local pollution on the Black Sea northwestern shelf during the passage of a front. The model is based on the nonlinear hydrodynamic equations for homogeneous viscous incompressible fluid under hydrostatics assumption and on the turbulent diffusion equation. An atmospheric di...

By the method of mathematical simulation, we study the evolution of local discharges of pollutants on the northwest shelf of the Black Sea induced by the motion of a cyclone. We use the nonlinear equations of motion of a homogeneous viscous fluid in the hydrostatic approximation and the equation of turbulent diffusion. A cyclonic formation is repr...

The wave fields generated by cyclonic atmospheric disturbances in the region of the northwest shelf of the Black Sea are studied by using a σ-coordinate model. The problem is solved in the hydrostatic approximation with regard for nonlinearity and turbulent viscosity. To improve the space resolution of the model, we realize the procedure of embedde...

We perform the theoretical analysis of the turbulent diffusion of impurities in the sea in the presence of long waves. The role of generators of long-wave motions is played by moving cyclonic baric formations. At the initial time, the zone of pollution is specified in the form of a spot of a passive substance localized near the Karkinitskii Bay in...

We study the influence of baroclinic tidal waves on the diffusion of an impurity spot in a continuously stratified fluid. The equation of turbulent diffusion is solved numerically by taking into account the wave currents. We establish the dependences of the characteristics of the diffusion process on parameters of baroclinic waves and the location...

We investigate the influence of baroclinic tidal waves on the diffusion of an impurity spot in a continuously stratified liquid. The equation of turbulent diffusion is solved numerically by taking into account the wave currents. We establish the dependences of the characteristics of the diffusion process on the parameters of the baroclinic wave and...

The paper studies the effect of the baroclinic tidal wave on the diffusion of a patch of impurities in a continuously stratified fluid. The turbulent diffusion equation is solved numerically, with wave currents being considered. The diffusion characteristics depend upon the parameters of a baroclinic wave and upon the location of the patch.

A mathematical model is presented for the diffusion of a local impurity patch in the presence of waves in a homogeneous fluid. A semi-empirical equation for the turbulent diffusion of a passive substance is solved numerically, with the initial and boundary conditions imposed. Temporal evolution of the patch is studied in a tidal wave field. Relatio...

Diffraction of a diurnal barotropic tide above a solitary bottom elevation is studied on the basis of a linear model. The relationships between the structure of the wave disturbance field, the extent of the underwater obstacle, its latitude, and the angle of climb of the tidal wave are obtained.