Week 1: Channel flow simulation using CONVERGE CFD

I. INTRODUCTION

Channel flow is an internal flow in which the confining walls change the hydrodynamic structure of the flow from an arbitrary Mote at the channel inlet to a certain state at the outlet The simplest illustration of internal flow is a laminar flow in a circular tube, while a turbulent flow in the rotor of a centrifugal compressor is an example of the most intricately shaped internal flow. Engineering devices employ channels with cross-sections of various geometrical shapes.

In this project, Converge Studio was used to establish a working idea of airflow simulation through a channel flow Schedule Now under certain parameters, which will be elaborated systematically in this report

II OBJECTIVE

1. setup channel flow simulation

2. Run the simulation for 3 different mesh sizes.

3. Plot velocity and pressure contours for 3 mesh sizes.

4. A Show plots for velocity, pressure, mass flow rate, and total cell count for all 3 mesh sizes.

GEOMETRY:

1. creating geometry using the creation tool for converge studio

2. Running diagnosis to check if there are any open edges or faces.

3. Checking the orientation of Normal, The normal should be such that their orientation is pointing towards the fluid flow

BOUNDARY FLAGGING:

The boundaries are flagged. The converge studio basically uses triangular blocks to create geometry. So by selecting the triangles boundaries are flagged.

• Inlet
• Outlet

• Top and Bottom Walls

• Front2D
• Back2D

CASE SETUP:

• Application Type = Time-based

• Materials- Air

• Gas simulation is checked. The species ore 02 and N2.

• Simulation parameters:

two main things considered

1. Select the following solver settings :

• Steady monitor:

• Simulation parameters :

• Solver parameters : [steady state]

• Boundary conditions :

• Regions and initialization:

• Physical model: uncheck turbulence modeling

• Grid control:

• post variable selection:

• Output files :

• Once. case setup Is complete all the Inputtlles are exported to a specific folder
• Then CygArin Is used to solve. Inputs and once the simulatIon Is complete converge converts the result data
Into a brill, Mat can be reed by Paraview.
• Post-processing is done in Paraview.

Results:

1. Grid size = 2e-4

. Mesh

. Mass flow rate plots:

. velocity plots:

. pressure plots:

. Total cell count plot:

. Grid size = 1.5e-0.4

. mesh

. mass flow rate plot :

. velocity plot:

. pressure polt:

. Total cell count:

. Grid size = 1.0e-04

.mesh

. mass flow rate plot:

. Velocity plot:

. pressure plot:

. Total cell count: