Question

Which of these is not stored at the cell centres in the staggered grids?

(a) Density

(b) Pressure

(c) Temperature

(d) Velocity

I had been asked this question in semester exam.

This question is from Incompressible Flows topic in portion Incompressible Flows & Compressible Flows of Computational Fluid Dynamics

Answer 1

In staggered grids, the variable that is not stored at the cell centers is:

(b) Pressure

In a staggered grid arrangement, the velocity components (such as $u$, $v$, and $w$) are stored at the faces of the cells (edges of the control volumes), while other variables like density, temperature, and pressure are stored at the cell centers. This approach is used to avoid the pressure-velocity coupling problem and to improve stability in the numerical solution.