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  • Users: garycvv
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  1. garycvv

    Mixing nozzle - two different temperature streams

    Hello, I'm working on an application where I would like to mix two streams of water at different temperatures, to make one stream of water at a uniform temperature. I don't know the exact flow rates yet but the application is for cooling a scientific instrument and the pipework will be ~1/2"...
  2. garycvv

    Compressible fluid transfer line compression/pumping losses

    Hello everyone, I've been asked to investigage a cryogenic transfer line that is carrying supercritical helium. This isn't my area of expertise and I'm struggling to find help, our previous Cryogenic engineer left in a hurry and I can't find anything in the literature although I'm probably...
  3. garycvv

    Heat exchanger book or software recommendations - operation away from nominal point

    Hello, I wonder if someone could advise on a good book for heat exchanger design? I'm responsible for a system where that requires several heat exchangers. We know that these are liekly to be operating at several different but steady operating points. We're going to have to pick the best...
  4. garycvv

    Software recommendations for manifold fluid analysis

    Hello, I wondered if anyone could help in recommending a software package for analysing a manifold flow. This manifold has dividing and combining flows. I've previously analysed a similar system following an example given in Miller's Internal flow Systems book. Where I looked up loss...
  5. garycvv

    Contact stress for pin in hole.

    Hello, I'm looking at a problem on an assembly in tension. This could be assumed to be a clevis pin arrangement where several plates are joined together using a pin. The holes in the plates are clearance holes and are a slightly larger diameter hole. I'd like to calculate the contact stress...
  6. garycvv

    Hydraulic motor control

    Hello, I've been asked to build a system that uses a hydraulic motor to drive it. I've worked out the torque and rpm required at various times throughout the drive phase of motion. I'm not sure what is required from the power pack to give the required flow and pressure to turn the motor and how...
  7. garycvv

    Busbar preparation

    Hello, I'm working on a project that involves bolting two aluminium bus bars together. I'm after some information about how to created the bolted joint. Is there a recommeded surface roughness and flatness for the two mating parts? I've found a reference from Bruker that mentions a German...
  8. garycvv

    Unable to edit Snippets in workbench

    Hello, I've got an odd problem. I'm using a command snippet in workbench for some post processing of a thermal analysis. For some reason after a while ANSYS won't let me edit the snippet, generally I can run the solution a few times and am able to edit the snippet. After a while it will no...
  9. garycvv

    Boiling curve for PWR conditions

    Hello, Can someone point me in the direction of a boiling curve for water at 155 bar as used in pressurised water reactors? The only curves I can find are for water at 1 atmosphere. Many thanks
  10. garycvv

    Linear guide

    I'm very new to automation and am lookng for some guidance. I'm looking at building a system that uses a motor, leadscrew and a linear guide as part of an actuation system that will move a door approximately 1m. The door itself will weigh about 100kg. As a starting point I was thinking of...
  11. garycvv

    Dynamics of a series of springs

    Hello, I'm wondering if someone can help me with a problem regarding the dynamics of a series of springs. If there are ~20 springs attached in series; the first spring is fixed at one end and a displacement is applied to the end spring, I would like to predict how much the first spring will...
  12. garycvv

    D command and nodal positions in ANSYS classic

    Hello, I'm just checking a few of my assumptions when using the D command. I'm trying to use the D command to apply displacements to some nodes. I assume that when I use the following command D,1, ,-1, , , ,UX, , , , , This applies a displacement of -1 in the x-direction to node one. This...
  13. garycvv

    Use a static solution to apply a pre-stress for a transient solution in APDL

    Hello, Can someone give me some advice on how to use a static solution to apply a pre-stress to a transient solution? After running the static solution I've then typed: Finish /sol antype, transient, restart It then tells me it can't find the .rnnn file. Even though I've used rescontrol in...
  14. garycvv

    Neuber's rule

    Hello, Can someone help me out. I'm struggling with Neuber's rule. I've attached an image which might help explain my problem. I've carried out an elastic analysis and found the result that is labelled point 1 in the attached image. I now need to use Neuber's hyperbola to get to point 2 where...
  15. garycvv

    ANSYS linearized stress

    Hello, I'm new to ANSYS and want to check something that is proably obvious to others. I'm performing an analysis that has pressure and heat loads. After it's solved I'll be plotting a path and to get the linearized stresses. The question I've got regards ANSYS interpretation of the thermal...

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