Recent content by shevir1

Hi pocketengineer, thanks for the suggestion. However the Dittus Boelter model applies for turbuent flow, where as mine is laminar. I am doing for two cases water in pipe and methane in pipe, so i will be able to easily apply Dittus etc equation to the later. For the case with water in pipe...

i was going for the second. average temp of fluid flowing in the pipe

ok, yes i was thinking of using an average temp. shall do. thanks

I have looked up many correlations, an example being nusselts number. but even in that correlation it required me to know the viscosity at wall, yet i still don't have the wall temperature, needed to calculate that. any other estimations i could try?

I have derived a few equations to determine temp distribution through pipe wall in subsea conditions. However I am finding it difficult to determine what the wall temperature will be. I need to know and use this temperature to further my analysis. As of now I know the following parameters...

yes this is what i assumed. of course it is better to work in just one coordinate system. thanks

see pic attached

Hi all, I am analysing the flow of water in a subsea pipe, and have been getting stuck in trying to solve the energy equation to plot a temperature distribution across the pipe diameter I have derived the equation as such seen in my attachement. But my main question is how should/would I...

Hi all I am conducting a fluid analysis on water flowing through a subsea pipe. Having used navier stokes equation, i derived the equation for velocity in the r-direction (using cylindrical coordinates. But when initially solving the energy equation to determine temperature distribution I...

ok, will do so this evening. I will incorporate compressible flow at later stages of the project. Will be in touch if i need any more assistance.

Yes that's the equation. Was last year. Sorry just wanted guidance on my approach to this situation. My main outcome was to find out how this distribution in pressure will look like as a plot analytically, not only to find the pressure drop.

yes I recall by Darcy equation, but can this be used on turbulent flows. I also noted other methods, such as blasius and moodys diagram but am a bit rusty on those. By using Blasius equation I equate a friction factor of : 0.0057 which method would be best to implement/provide greatest accuracy?

I see, this approach sounds more familiar. I calculate a reynolds number of: 36686 this was found from velocity and diameter previously stated, and with density and dynamic visc for water at an elevated temp.

Thank you for your response and recommendations, I initially chose the 2D flow to simplify the analysis and was pointed in the direction that 1D or 2D was most commonly used for fluid dlow analysis within pipelines.

Just in the radial position