Author: Benjamin Mullen, Cornell University

Problem Specification

1. Pre-Analysis & Start-Up

2. Geometry

3. Mesh

4. Physics Setup

5. Numerical Solution

6. Numerical Results

7. Verification & Validation

Exercises

Comments

# Numerical Solution

### Solution Methods

In the *Outline* window, select ** Solution Methods** to open the

*Solution Methods*window. Under

*Spatial Discretization*, change the option under

*Momentum*from

**to**

*First Order Upwind***. Under**

*Second Order Upwind**Energy*, also change the option to

**.**

*Second Order Upwind*

### Monitors

In the *Outline* window, click ** Monitors** to open the

*Monitors*window. In the

*Monitors*window, select

**and press**

*Residuals - Print,Plot***. This will open the**

*Edit...**Residual Monitors*window. We want to change the convergence criteria for our solution. Under

*Equation*and to the right of

**, change the**

*Continuity***to**

*Absolute Criteria*`1e-6`

. Repeat for **,**

*x-velocity***, and**

*y-velocity***, then press**

*energy***.**

*OK*

### Reference Values

In the *Outline* window, select ** Reference Values**. Under

*Compute From*, select

**. Ensure that the values displayed are the values we specified.**

*Inlet*### Solution Initialization

In the *Outline* window, select ** Solution Initialization**. We need to make an "Initial Guess" to the solution so FLUENT can iterate to find the final solution. In the

*Solution Initialization*window, select

**then under**

*Standard Initialization***, select**

*Compute from***from the drop down box. Check to see that the values that generate match our inputted values, then press**

*Inlet*

*Initialize*### Data File Quantities

After we have initialized the solution, we can select additional quantities to be transferred over to CFD-Post. These quantities are not selected by default and so we must select them ourselves. Go to * File>Data File Quantities*. Under

*, find and select*

**Additional Quantities***and click*

**Skin Friction Coefficient***OK*.

### Run Calculation

In the *Outline* window, select ** Run Calculation**. Change the

**to 1000. Double click**

*Number of Iterations***to run the calculation. After the iterations have converged, save the project, and you may close the solver.**

*Calculate***Go to Step 6: Numerical Results**