Shashank Mishra

12 Questions 15 Answers 0 Followers

Questions related from Shashank Mishra

Can someone help me prove the approximate coefficient of numerical diffusion?

Hi, Can someone please help me with deriving that false/numerical/artificial diffusion is flow direction dependent and it is given as (image attached). also as per Patankar book , numerical...

31 October 2016 6,455 11 View

If Turbulent flows are characterized by high Reynolds number, why they are said to be highly diffusive in nature ?

Hi, since the Reynolds number is high for Turbulent flows, the viscous force are over powered by convective forces, meaning the dampening of disturbances will not be efficient. This results into...

28 July 2016 5,836 8 View

How to impose initial condition on vorticity if solving NS equation in primitive variables ?

Hi, I am solving time dependent inviscid flow inside a rectangular channel and I have to impose initial condition on vorticity. The inlet and outlet velocity profile is given which is linear in y,...

07 June 2016 9,641 4 View

Why the boundary layer thickness for flow over a flat plate continuously increases?

For external flow over a flat plate, what is the reason that boundary layer thickness is continuously increasing. What physics is responsible for this ?

13 April 2016 7,940 20 View

Why re-circulation / separation results into an increase in drag?

Hi, The mixing associated with separation and re-circulation results into more entropy generation and consequently increases the losses. But why drag is increased when we have separating flows?

11 December 2015 2,764 12 View

Why Ansys fluent Inviscid model is not getting converged for simple duct problem?

Hi,I was trying to run a simple duct flow case with laminar and inviscid flow. The objective was to check the outlet velocity if I have imposed a parabolic velocity profile at the inlet depicting...

09 October 2015 915 7 View

Can anyone help with simple MHD simulation setup in Fluent?

Hello everyone, I am trying to simulate a simple pipe flow with conductive fluid under the influence of a constant magnetic field. I went through the MHD module of fluent, but failed to set up...

17 August 2015 9,901 9 View

How can I do CFD Modelling of a single droplet under the influence of heated wall and Hot air inlet flow ?

Hello Everyone, I am trying to perform CFD simulation of a 2D Evaporation problem. It involves a stationary droplet resting on the surface of a heated wall of a duct, ( the shape of the droplet...

04 June 2015 1,412 3 View

What is the correct way of specifying turbulence intensity for simulating decay of turbulence in Fluent?

Hi, I am trying to study the effect of swirl on Turbulence using CFD. My objective is to specify turbulence intensity at the inlet of the pipe and study the effect of swirl generators on...

07 March 2015 3,901 6 View

What is the correct boundary condition of temperature at the outlet of 3D Converging diverging nozzle in Fluent?

Hi, My objective is to study the variation in temperature as the fluid is expanded across a 3D nozzle. And therefore, I cannot specify temperature at the outlet. Do I need to create a separate...

07 March 2015 2,581 7 View

What is the transient velocity profile of blood flow in human ?

Hi, I am trying to see the effect of modified AVF ( arteriovenous fistula ) on wall shear stress and oscillating shear stress. Is there any good literature from where I can find what velocity...

07 March 2015 4,003 3 View

Is dynamic meshing in Fluent practical only for coarse mesh?

Hi, I am trying to run a simulation in fluent for 2D Wind Turbine using Dynamic meshing.I read somewhere that time step required for convergence in dynamic meshing has to be very small for very...

08 July 2014 5,942 9 View