Fluent hooks the battery_e_cond::msmdbatt UDF to the busbar material.

h.In the Question dialog box, click Yes to overwrite copper.

The new material (p_material) appears under Materials.

3.Create a new material for the negative tab with the same properties as the material for the positive tab.

Note

You do not need to create two different materials for the positive and negative tabs if the positive and negative tabs are made of the same material. In this tutorial, the two different tab materials with the same physical properties have been created for demonstration purposes only.

a.From Fluent Solid Materials drop-down list, select p_material.

b.Enter n_material for Name and nmat for Chemical Formula.

c.Click Change/Create.

d.In the Question dialog box, click No to retain p_material and add the new material (n_material) to the materials list.

e.Close the Create/Edit Materials dialog box.

25.4.4.3. Defining Cell Zone Conditions

Assign e_material to the cell zone, p_material to the positive tab and n_material to the negative tab. 1. Assign e_material to the e_zone zone.

Setup → Cell Zone Conditions → e_zone → Edit...

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a.In the Solid dialog box, select e_material from the Material Name drop-down list.

b.Click OK.

2.In a similar manner, assign p_material to tab_pzone and n_material to tab_nzone.

25.4.4.4. Defining Boundary Conditions

Define the thermal boundary conditions for all walls for the cell, and positive and negative tabs. 1. Set the convection boundary condition for wall_active.

Setup → Boundary Conditions → wall_active → Edit...

a.In the Wall dialog box, under the Thermal tab, under Thermal Conditions, enable Convection.

b.Set Heat Transfer Coefficient to 5 [w/m2K].

c.Retain the default value of 300 [K] for Free Stream Temperature.

d.Click OK to close the Wall dialog box.

You do not need to change the settings under the UDS tab since the boundary conditions for the two UDS scalars have been set automatically when you defined the cell zone conditions.

2.Copy the boundary conditions for wall_active to wall_p and wall_n.

Setup → Boundary Conditions → wall_active → Copy...

25.4.4.5. Specifying Solution Settings

1.Turn off the flow equation.

Solution → Controls → Equations...

a. In the Equations dialog box, deselect Flow from the Equation selection list.

b.Click OK.

2.Remove the convergence criteria to ensure that automatic convergence checking does not occur.

Solution → Reports → Residuals...

a.In the Residual Monitors dialog box, select none from the Convergence Criterion drop-down list.

b.Click OK.

3.Create a surface report definition for the voltage at the positive tab.

Solution → Reports → Definitions → New → Surface Report → Area-Weighted Average

a. In the Surface Report Definition dialog box, enter voltage_vp for Name.

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b.Select User Defined Scalars... and Potential Phi+ from the Field Variable drop-down lists.

c.From the Surfaces selection list, select tab_p.

d.In the Create group box, enable Report File, Report Plot and Print to Console.

e.Click OK to save the voltage_vp report definition and close the Surface Report Definition dialog box.

f.Rename the report output file.

Solution → Monitors → Report Files → voltage_vp-rfile Edit...

i.Enter ntgk-1c.out for Output File Base Name.

ii.Click OK to close the Edit Report File dialog box. g. Modify the attributes of the plot axes.

Solution → Monitors → Report Plots → voltage_vp-rplot Edit...

i.In the Edit Report Plot dialog box, under the Plot Window group box, click the Axes... button to open the Axes dialog box.

ii.Select the X axis and set Precision to 0.

iii.Click Apply.

iv.Select the Y axis and set Precision to 2.

v. Click Apply and close the Axes dialog box.

Note

You must click Apply to save the modified settings for each axis.

vi.Make sure that time-step is selected from the Get Data Every drop-down list.

vii.Click OK to close the Edit Report Plot dialog box.

4.Create a volume report definition for the maximum temperature in the domain.

Solution → Reports → Definitions → New → Volume Report → Max...

a.In the Volume Report Definition dialog box, enter max_temp for Name.

b.Select Temperature... and Static Temperature from the Field Variable drop-down lists.