## What is rho in cylindrical coordinates?

Vectors are defined in cylindrical coordinates by (ρ, φ, z), where. ρ is the length of the vector projected onto the xy-plane, φ is the angle between the projection of the vector onto the xy-plane (i.e. ρ) and the positive x-axis (0 ≤ φ < 2π), z is the regular z-coordinate.

### What is Del operator in spherical coordinates?

To convert it into the spherical coordinates, we have to convert the variables of the partial derivatives. In other words, the Cartesian Del operator consists of the derivatives are with respect to x, y and z. But Spherical Del operator must consist of the derivatives with respect to r, θ and φ.

**What is the Laplacian of a vector?**

Vector Laplacian , is a differential operator defined over a vector field. The vector Laplacian is similar to the scalar Laplacian; whereas the scalar Laplacian applies to a scalar field and returns a scalar quantity, the vector Laplacian applies to a vector field, returning a vector quantity.

**Can rho be negative in cylindrical coordinates?**

ρ, spelled ‘rho’ and pronounced ‘row’, is the distance from the point to the origin. ρ cannot be negative. θ, spelled ‘theta’ and pronounced ‘thay tuh’, is the angle from the x-axis to the projection of the vector connecting the origin and point onto the xy-plane. θ must be in the interval [0,2π).

## What is the relationship between the Navier-Stokes equation and the Bernoulli equation?

Although Bernoulli’s equation is system-specific, the equation is universal in that its derivation from the Navier-Stokes equation does not rely on the application of boundary conditions or specific geometries.

### What are hydrostatic and deviatoric stresses?

This page introduces hydrostatic and deviatoric stresses. The two are subsets of any given stress tensor, which, when added together, give the original stress tensor back.

**What is deviatoric stress in tensor notation?**

Deviatoric Stress. Deviatoric stress is what’s left after subtracting out the hydrostatic stress. The deviatoric stress will be represented by σ′ σ ′ . For example. σ′ = σ−σHyd σ ′ = σ − σ Hyd. In tensor notation, it is written as.

**What is the integral equation form for deviatoric stress?**

The integral equation form for the deviatoric stresses is expressed in terms of a relaxation modulus function which is defined by an idealized experiment in which, at time zero ( t = 0), a specimen is subjected to suddenly applied and constant strain, e 0, and the stress response, s ( t), is measured.

## What is a cylindrical coordinate system?

Cylindrical coordinate system. Vector fields. Vectors are defined in cylindrical coordinates by (ρ, φ, z), where. ρ is the length of the vector projected onto the xy-plane, φ is the angle between the projection of the vector onto the xy-plane (i.e. ρ) and the positive x-axis (0 ≤ φ < 2π), z is the regular z-coordinate.