Volume 44, Issue 5 | Lobachevskii Journal of Mathematics

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Volume 44, Issue 5

May 2023

Part 1. Special issue: Applied Mathematics and Mechanical Engineering, Editors: A. M. Gaifullin and D. A. Gubaidullin. Part 2. Special issue: Complex and Functional Analysis, Differential Equations, and Mathematical Modelling (Proceedings of the Ufa Autumn Mathematical School-2021), Editors: Z. Yu. Fazullin and R. S. Yulmukhametov

56 articles in this issue

Dynamics of Gas Bubbles in a Spherical Cluster under Stochastic Distribution of Their Size and Position
I. A. Aganin
A. I. Davletshin
OriginalPaper 23 August 2023 Pages: 1529 - 1537
Dynamics of Gas Bubbles in a Spherical Cluster under the Increase of Their Pressure
I. A. Aganin
A. I. Davletshin
OriginalPaper 23 August 2023 Pages: 1538 - 1547
A Model of Joint Collapse of Cavitation Bubbles Located on a Spherical Surface
A. A. Aganin
T. F. Khalitova
OriginalPaper 23 August 2023 Pages: 1548 - 1557
Collapse of a Toroidal Cavity in Liquid near a Wall
A. A. Aganin
L. A. Kosolapova
V. G. Malakhov
OriginalPaper 23 August 2023 Pages: 1558 - 1563
Focusing of Compression Waves in a Pipe Containing Annular Bubble Cluster
U. O. Agisheva
M. N. Galimzyanov
OriginalPaper 23 August 2023 Pages: 1564 - 1570
Determination of Parameters of Hydraulic Fracture Perpendicular to Borehole Axis
R. A. Bashmakov
Z. M. Nagaeva
A. A. Shammatova
OriginalPaper 23 August 2023 Pages: 1571 - 1578
Modeling the Dynamics of a Boiling Liquid Nitrogen Jet under Cryogenic Temperatures
R. Kh. Bolotnova
V. A. Korobchinskaya
E. F. Gainullina
OriginalPaper 23 August 2023 Pages: 1579 - 1586
Equation of State for Liquid and Gaseous Nitrogen in Cryogenic Temperature Range
R. Kh. Bolotnova
E. F. Gainullina
V. A. Korobchinskaya
OriginalPaper 23 August 2023 Pages: 1587 - 1592
Determination of the Anisotropic Reservoir Permeability by Liquid Flow Rate Measurements at Wells under Conditions of Three-Phase Filtration
A. V. Elesin
A. Sh. Kadyrova
OriginalPaper 23 August 2023 Pages: 1593 - 1599
Wave Dynamics of a Gas Bubble Covered with a Hyperelastic Shell in a Viscoelastic Liquid
Yu. V. Fedorov
D. D. Gubaidullina
OriginalPaper 23 August 2023 Pages: 1600 - 1605
Transmission of an Acoustic Wave Through a Multilayer Medium Containing Layers of Bubble Liquid
R. N. Gafiyatov
OriginalPaper 23 August 2023 Pages: 1606 - 1609
Temperature Visualization of the Jet-Vortex Wake Behind an Aircraft
A. M. Gaifullin
Yu. N. Sviridenko
OriginalPaper 23 August 2023 Pages: 1610 - 1615
Swirling Three-Dimensional Turbulent Wall Jet
A. M. Gaifullin
A. S. Shcheglov
OriginalPaper 23 August 2023 Pages: 1616 - 1620
Dynamics of Sonic Wave under Reflection and Transmission at the Interface of Water and Sand Saturated with Water or Gas Hydrate
E. V. Galiakbarova
G. R. Karimova
G. R. Rafikova
OriginalPaper 23 August 2023 Pages: 1621 - 1628
Effect of the Cone-Shaped End Vertex Angle of a Closed Tube on Resonant Gas Oscillations
D. A. Gubaidullin
S. A. Fadeev
L. R. Shaidullin
OriginalPaper 23 August 2023 Pages: 1629 - 1633
Acoustic Waves Reflection from a Layer of a Multifractional Polydispersed Gas–Droplet Mixture
D. A. Gubaidullin
R. R. Zaripov
OriginalPaper 23 August 2023 Pages: 1634 - 1637
Resonant Oscillations of Gas in Tubes with Different Tips
D. A. Gubaidullin
R. G. Zaripov
S. A. Fadeev
OriginalPaper 23 August 2023 Pages: 1638 - 1643
Numerical Study of the Excitation of Acoustic Gas Oscillations in an Open Tube with a Heated Section
D. A. Gubaidullin
B. A. Snigerev
OriginalPaper 23 August 2023 Pages: 1644 - 1649
Pressure Pulse Transmission and Reflection from Layer in Porous Medium with Variable Initial Content of Gas Hydrate
A. A. Gubaidullin
O. Yu. Boldyreva
D. N. Dudko
OriginalPaper 23 August 2023 Pages: 1650 - 1656
Reflection and Transmission of a Sound Wave Through the Boundary of a Three-Phase Mixture
D. D. Gubaidullina
Yu. V. Fedorov
OriginalPaper 23 August 2023 Pages: 1657 - 1660
Analysis of the High-Speed Liquid Impact onto a Curved Liquid Surface with Heymann’s Theory
T. S. Guseva
OriginalPaper 23 August 2023 Pages: 1661 - 1670
Jet Impact Stage of Bubble Collapse Near a Local Depression on a Solid Wall
T. S. Guseva
OriginalPaper 23 August 2023 Pages: 1671 - 1678
Computer Simulation of the Flow of Two-Phase Media in Channels and Pipes of Complex Geometric Shape
R. I. Ibyatov
F. G. Akhmadiev
OriginalPaper 23 August 2023 Pages: 1679 - 1685
Determination of the Reservoir Permeability Coefficient by Temperature Measurements During the Start-Up of a Horizontal Well
M. Kh. Khairullin
E. R. Badertdinova
Ravil M. Khairullin
OriginalPaper 23 August 2023 Pages: 1686 - 1691
Numerical Simulation of Outgoing Shock Waves at Cavitation Bubble Collapse
T. F. Khalitova
N. A. Khismatullina
OriginalPaper 23 August 2023 Pages: 1692 - 1699
Modeling of the Two-Phase Flow Through the Hydraulic Fractures in an Oil Reservoir
M. R. Khamidullin
K. A. Potashev
A. B. Mazo
OriginalPaper 23 August 2023 Pages: 1700 - 1706
Self-Similar Solution of the Problem of Superheated Water Vapor Injection into a Porous Reservoir
M. K. Khasanov
S. L. Borodin
M. V. Stolpovsky
OriginalPaper 23 August 2023 Pages: 1707 - 1713
Point Source-Induced Spherically Symmetric Flow of a Viscous Heat-Conducting Compressible Perfect Gas
O. E. Kirillov
OriginalPaper 23 August 2023 Pages: 1714 - 1720
Investigation of the Influence of Weight Coefficients in Solving the Problem of Permeability Identification for an Oil Field
V. P. Kosyakov
OriginalPaper 23 August 2023 Pages: 1721 - 1727
Observer Based Control for Continuous Systems with Discrete Measurements and Uncertain Disturbances
A. I. Malikov
OriginalPaper 23 August 2023 Pages: 1728 - 1737
Identification of Elastic Boundary Conditions and Crack Depth
T. M. Mannapova
U. O. Agisheva
M. N. Galimzyanov
OriginalPaper 23 August 2023 Pages: 1738 - 1743
Nonlinear Bending and Buckling of Oblate Ellipsoidal Shells with Variable Thickness Under External Pressure and Temperature Change
V. E. Moiseeva
Z. V. Skvortsova
OriginalPaper 23 August 2023 Pages: 1744 - 1751
Comparison of the Results of 2D and 3D Numerical Simulations of the Rising Bubble in Stagnant Viscous Liquid
I. V. Morenko
OriginalPaper 23 August 2023 Pages: 1752 - 1757
Semi-Analytical Solution for a Slug Test in Hydraulically Fractured Well
P. E. Morozov
A. I. Abdullin
OriginalPaper 23 August 2023 Pages: 1758 - 1764
Numerical Study of the Process of Gas Extraction from a Gas Hydrate Reservoir with Inhomogeneous Permeability
N. G. Musakaev
S. L. Borodin
OriginalPaper 23 August 2023 Pages: 1765 - 1770
Numerical Simulation of Collapse and Rebound of a Cavitation Bubble in Water
I. N. Mustafin
OriginalPaper 23 August 2023 Pages: 1771 - 1777
Influence of Temperature Dependence of Viscosity on the Stability of Fluid Flow in an Annular Channel
A. D. Nizamova
V. N. Kireev
S. F. Urmancheev
OriginalPaper 23 August 2023 Pages: 1778 - 1784
Comparison of the MacCormack’s and the Kurganov–Tadmor’s Schemes for Sod’s Problem
P. P. Osipov
R. R. Nasyrov
OriginalPaper 23 August 2023 Pages: 1785 - 1788
Pressure Diffusion Waves in a Porous Medium Saturated with Two Immiscible Liquids
R. V. Sadovnikov
OriginalPaper 23 August 2023 Pages: 1789 - 1795
Numerical Well Test Analysis of Gas Reservoirs
M. N. Shamsiev
V. R. Gadil’shina
OriginalPaper 23 August 2023 Pages: 1796 - 1800
Reflection of Acoustic Waves Falling Under a Direct Angle on a System of Flat Layers of a Vapor-Gas-Droplet Mixture with Solid Particles
E. A. Teregulova
OriginalPaper 23 August 2023 Pages: 1801 - 1806
Multiphase Flow Problem with a Limiting Gradient under Thermal Influence on the Reservoir Through Horizontal Wells
A. V. Tsepaev
OriginalPaper 23 August 2023 Pages: 1807 - 1812
Calculation of Two-Layer Cylindrical Shells Based on the Spline Variant of the Finite Element Method
N. M. Yakupov
H. G. Kiyamov
I. Z. Mukhamedova
OriginalPaper 23 August 2023 Pages: 1813 - 1819
To the Calculation of Reinforced Structural Elements of Complex Geometry
S. N. Yakupov
H. G. Kiyamov
N. M. Yakupov
OriginalPaper 23 August 2023 Pages: 1820 - 1825
The Stability of Continuous-Discrete Dynamical Systems under Fast Switching
S. V. Akmanova
N. A. Kopylova
OriginalPaper 23 August 2023 Pages: 1826 - 1832
Boundaries of the Region of Stability of Autonomous Hamiltonian Systems
A. S. Belova
L. S. Ibragimova
I. G. Mustafina
OriginalPaper 23 August 2023 Pages: 1833 - 1838
Investigation of the Approximation Error of the Difference Scheme for the Mathematical Model of Hydrodynamics
A. E. Chistyakov
A. V. Nikitina
M. V. Porksheyan
OriginalPaper 23 August 2023 Pages: 1839 - 1846
Entire Functions of Sine Type for Convex Apeirogons
K. P. Isaev
A. V. Lutsenko
R. S. Yulmukhametov
OriginalPaper 23 August 2023 Pages: 1847 - 1853
On Analytic Perturbations of a Non-Self-Adjoint Anharmonic Oscillator
Kh. Ishkin
OriginalPaper 23 August 2023 Pages: 1854 - 1869
Interpolation Properties of Certain Classes of Net Spaces
A. Kalidolday
E. Nursultanov
OriginalPaper 23 August 2023 Pages: 1870 - 1878