Neglecting the non-linear term in the Navier-Stokes equations simplifies the analysis, often leading to linear models that are easier to solve and analyze. This approximation is typically valid in conditions where the flow is dominated by viscous forces, such as in low Reynolds number flows. However, this simplification may not accurately capture the dynamics of turbulent or high-speed flows, where non-linear interactions play a crucial role. Thus, the decision to neglect non-linear terms depends on the specific flow regime being studied.
George Gabriel Stokes significantly contributed to the Navier-Stokes equations through his work on fluid dynamics, particularly in the formulation of the equations that describe the motion of viscous fluid substances. He introduced the concept of viscosity and derived equations that model the flow of incompressible fluids. His work laid the foundational principles necessary for the development of the Navier-Stokes equations, which are essential for understanding fluid flow in various applications, from aerodynamics to oceanography. Stokes' contributions ultimately helped formalize the mathematical framework that governs the behavior of fluid motion.
Y.-N Kim has written: 'Calculation of helicopter rotor blade/vortex interaction by Navier-Stokes procedures' -- subject(s): Rotors (Helicopters), Navier-Stokes equations
To derive the Navier-Stokes equations in spherical coordinates, we start with the general form of the Navier-Stokes equations in Cartesian coordinates and apply the transformation rules for spherical coordinates ((r, \theta, \phi)). This involves expressing the velocity field, pressure, and viscous terms in terms of the spherical coordinate components. The continuity equation is also transformed accordingly to account for the divergence in spherical coordinates. Finally, we reorganize the resulting equations to isolate terms and ensure they reflect the physical properties of fluid motion in a spherical geometry.
The Navier-Stokes equations describe the motion of fluid substances and can be derived in cylindrical coordinates by starting from the fundamental principles of conservation of momentum, mass, and energy. In cylindrical coordinates (r, θ, z), the equations account for the radial, angular, and axial components of velocity. The derivation involves applying the continuity equation for mass conservation and the momentum equations, incorporating the effects of pressure, viscous forces, and body forces while using the appropriate transformation of the Laplacian and divergence operators to fit the cylindrical coordinate system. The resulting equations capture the dynamics of fluid flow in cylindrical geometries.
it is easy you can see any textbook........
The Navier-Stokes equations are a set of nonlinear partial differential equations that describe the motion of fluid substances, such as liquids and gases. They account for various forces acting on the fluid, including viscosity, pressure, and external forces, and are fundamental in fluid dynamics. These equations are used to model a wide range of phenomena, from weather patterns to the flow of air over wings. Solving the Navier-Stokes equations in three dimensions remains one of the major unsolved problems in mathematics.
In fluid dynamics, the energy equation and the Navier-Stokes equations are related because the energy equation describes how energy is transferred within a fluid, while the Navier-Stokes equations govern the motion of the fluid. The energy equation accounts for the effects of viscosity and heat transfer on the fluid flow, which are also considered in the Navier-Stokes equations. Both equations are essential for understanding and predicting the behavior of fluids in various situations.
The key assumptions underlying the Navier-Stokes equations are that the fluid is continuous, incompressible, and viscous. These equations also assume that the flow is steady and that the forces acting on the fluid are balanced.
Barry Koren has written: 'Multigrid and defect correction for the steady Navier-Stokes equations' -- subject(s): Numerical solutions, Aerodynamics, Lagrange equations, Navier-Stokes equations, Mathematical models
B. D. Semeraro has written: 'Solution of the Navier-Stokes equations for a driven cavity' -- subject(s): Numerical solutions, Cavities (Airplanes), Navier-Stokes equations
Vivette Girault has written: 'Finite element approximation of the Navier-Stokes equations' -- subject(s): Finite element method, Navier-Stokes equations, Numerical solutions, Viscous flow, Instrumentation, Airway (Medicine), Methods, Respiratory Therapy, Cardiopulmonary Resuscitation, Trachea, Airway Obstruction, Intubation, Therapy, Airway Management 'Finite element methods for Navier-Stokes equations' -- subject(s): Finite element method, Navier-Stokes equations, Numerical solutions, Viscous flow
Naruhisa Takashima has written: 'Navier-Stokes computations of a viscous optimized waverider' -- subject(s): Fluid dynamics, Navier-Stokes equations
George Gabriel Stokes significantly contributed to the Navier-Stokes equations through his work on fluid dynamics, particularly in the formulation of the equations that describe the motion of viscous fluid substances. He introduced the concept of viscosity and derived equations that model the flow of incompressible fluids. His work laid the foundational principles necessary for the development of the Navier-Stokes equations, which are essential for understanding fluid flow in various applications, from aerodynamics to oceanography. Stokes' contributions ultimately helped formalize the mathematical framework that governs the behavior of fluid motion.
Moshe Israeli has written: 'Marching iterative methods for the parabolized and thin layer Navier-Stokes equations' -- subject(s): Iterative solution, Navier-Stokes equation
M. M. Rai has written: 'Three-dimensional Navier-Stokes simulations of turbine rotor-stator interaction' -- subject(s): Turbomachines, Navier-Stokes equations
Y.-N Kim has written: 'Calculation of helicopter rotor blade/vortex interaction by Navier-Stokes procedures' -- subject(s): Rotors (Helicopters), Navier-Stokes equations
Chistopher A. Kennedy has written: 'Low-storage, explicit Runge-Kutta schemes for the compressible Navier-Stokes equations' -- subject(s): Stability, Errors, Direct numerical simulation, Wave equations, Runge-Kutta method, Navier-Stokes equation