step 6, muliply the constant speed c is unnecessary

[musicpiano]

delete the multiplication of c because there are already multiply u and v in the equation.

[bugleilei]

您的来信已收到，谢谢！

[smith-kyle]

I'm a little late to the party, but I noticed you all aren't using a notebook review tool and wanted to invite you to review this pull request with GitNotebooks: https://gitnotebooks.com/barbagroup/CFDPython/pull/83

It lets you do things like comment on rendered markdown and code cells, so might be an easy win for your PR reviews.

[bugleilei]

您的来信已收到，谢谢！