Nishidh Shailesh Naik Burye

9 Questions 5 Answers 0 Followers

Questions related from Nishidh Shailesh Naik Burye

Residuals are getting converged, but at a very migh magnitude of values. Why??

I am running a coarse DNS case for pipe flow with 2.1 Million cells. My residuals are quite fluctuating as its a fully turbulent annular pipe flow case but its getting statistically converged to a...

30 May 2024 2,024 5 View

Effect of \nu variation for a turbulent pipe flow at a constat Reynolds number ???

I am trying to run a turbulent pipe flow simulation with turbulent Reynolds number of 600, for 15 seconds, the flow is pressure driven due to gravity enforced buoyancy force which gives kinematic...

21 May 2024 5,488 3 View

Why <u'v'> cross-corelation is important whilte studying Reynolds Stresses in most studies??

In most common turbulence model studies, when considering Reynolds stresses the components of auto-correlation, , , and components of cross-correlation are considered. In the research studies...

03 May 2024 2,735 2 View

Enforcing Wall shear stress (\tau_w) as a boudnary condition in OpenFOAM?

I am working on WMLES (wall Modelled LES) for which if I calculate my wall shear stress analytically and want to enforce it as a boundary condition at the wall patch, so that I do not need to...

16 April 2024 9,011 3 View

Relation between Bulk (Mean) and Friction Reynolds Number??

Is there any specific relation between Re_b (bulk/ Mean Reynolds number) and Re_\tau (friction Reynolds Number). In few of the literature and experimental work I have gone through researchers give...

02 April 2024 829 5 View

Why are the iterations needed to calculate final converged value of Yplus for wallFunctions in OpenFOAM?

This is a code block from nutWallFunction library in OpenFOAM where in, effective kinematic viscosity ($\nut_w$) at the wall is calculated using resolved field(in case of LES)/ mean field(in case...

05 March 2024 9,499 2 View

Effect of Prandtl on velocity for Natural Convection (Rayleigh Benard)?

When Prandtl number is increased for two cases tested over same Rayleigh number, the peak vertical-velocity decreases as Prandtl is increased. This is questionable to the fact that in general...

12 February 2024 4,154 2 View

How to calculate y+ analytically before the simulation if we have fully developed flow for the Annular pipe (a double wall bounded)?

I have a fully developed pipe flow in with Inner radius (r) and outer radius (R), using pressure driven flow condition due to buoyancy, - (1/rho) dP/dx = g and velocity scaling u* = sqrt ( (-R/...

10 February 2024 3,573 3 View

Why in low prandtl number fluids development of thermal boundary layer in CFD is time taking?

Low Prandtl number fluids like air, Pr

25 January 2024 4,943 3 View