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Recent content by adrich91

  1. adrich91

    Galvanic corrosion for material choice

    Good afternoon, I have a couple of questions and proposals related to the phenomenon of galvanic corrosion that I would like to know your opinion. Context: At the moment I have a cast iron pump, 3 way valves in carbon steel flanged, other 2 way valves in stainless steel, carbon steel piping...
  2. adrich91

    NPSH and maximum vaccum of the pump

    I understand this point, but the manufacturer told me that the suction pipe length must not exceed 4 m in height. We were always talking about fluid, so i dont understand why he told me that if npshr is 0.25 m Thanks
  3. adrich91

    NPSH and maximum vaccum of the pump

    Hello again, I don't quite understand this, because on one occasion, a manufacturer of self-priming pumps told me that his pumps had an NPSHr of 0.25 m! but that the maximum head they could lift was 4 m on the suction side [neutral]. So I don't understand anything, given that with that NPSHr...
  4. adrich91

    NPSH and maximum vaccum of the pump

    Hello again, Sorry for the delay, I was travelling. The pump is lobe, i.e. positive displacement. Yes, when I say NPSHd I mean available (NPSHa). I did the calculations to make an example to ask my doubts. It´s not a real problem so i cant give you more details. I was wondering if it could be...
  5. adrich91

    NPSH and maximum vaccum of the pump

    Good afternoon, I would like to ask you a question about the NPSHr of a pump and the NPSHd. Let's imagine a pump that has a NPSHr of 1 m. This means that the difference between the pressure at the inlet of the pump and the vapour tension needs to be at least 1 m so that it does not cavitate...
  6. adrich91

    Bernouilli in vertical pipes

    Good, I thank you all (especially Snickster) for the great class on fluid mechanics. I have always applied bernouilli for this kind of pumping problems (without an equal loop up and down) of pumping at X meters height and so on... but of course, now I had the doubt of being at the same level...
  7. adrich91

    Bernouilli in vertical pipes

    Good evening My question is not whether it goes through a trench or overhead, but how to approach the calculation of head loss when there is an important vertical section in the system but it does not end at the top, but goes down. If I count the head losses in pipes (valves, elbows...etc) I...
  8. adrich91

    Bernouilli in vertical pipes

    Good morning, I have a doubt about the calculation of the installation curve for dimensioning the pump necessary to pump the fluid flow I want. The system is as shown below, where practically the source and end tank would be at the same height, but in between, apart from the elbows, valves...
  9. adrich91

    Process pressure

    Hi! I tried to download PSIM2, but it doesnt work! :S ¿can u help me or provide me a working link? Ty :)
  10. adrich91

    Process pressure

    The idea I have is to be able to put for example a tank, a pump and some accessories (elbows, valves...etc) and play with the head loss to see how the flow affects it and all that (pump curve vs. installation curve). I don't know if there is a programme that is more visual (like drawings) where...
  11. adrich91

    Liquid outlet pressure concept

    This is the web where I extracted the image (https://www.iagua.es/blogs/miguel-angel-monge-redondo/fbh-iv-caudal-presion-y-velocidad-agua) Thanks!
  12. adrich91

    Liquid outlet pressure concept

    Hello again! Thank you very much for your comments and contributions! Now, I have a new question (and thanks! hehe, it's always a good opportunity to learn something new). What would happen if in the drawing I show you (pumping from an open tank to an open pipe) with the head losses in the...
  13. adrich91

    Liquid outlet pressure concept

    Good evening, everyone, I'm back here again for further enlightenment (greatly appreciated :)) I was reviewing the subject of pumping liquids and I had understood that at the exit of the pipe to the atmosphere (for example a tap or end of open pipe) the pressure was always the atmospheric...
  14. adrich91

    Process pressure

    Hello colleagues! Today I'm here again to get some help with some issues I have in my head. First of all: I hear a lot the expression ‘to clean with water with pressure on something’ and I suppose that it is not really pressure that is being talked about, but a lot of flow, isn't it? Because I...
  15. adrich91

    CFD and FEM learning

    I don't have a deep knowledge of tensions or anything like that, so it seems sensible to start learning the basics on my own with a book and then, when I have a base, maybe do a course, right? I've seen something about Open Foam (which is open source), do you think it's a good place to start...
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