Hi,
I believe I'd be a great candidate for this project. Not only am I native English speak who takes pride in my strong communication skills, but I've spent the last 3 years working for a petroleum pipeline company. The details of pipe-flow are very familiar to me, and this is why I'm willing to do this project so quickly, at such a low price.
If accepted, I'll have a few questions for you, such as:
1. Do you have a preferred turbulence model?
2. Do you have any known fluid dynamic parameters for the joints?
3. Will this pipe experience any significant build-up or corrosion over time, and does this need to be factored into the roughness?
4. Do you want to factor in gravity? Will you provide dimensions?
Based on your needs, I'll create an interactive Excel sheet that generates your chart of interest. It'll also have parameters that can be adjusted in case any of your designs change later.