To Do List

• Fix wall's plots
• Get data from cool-down & simulate
• COMSOL Model?
• Student Seminar Presentation (Dec 8, 2016 in auditorium)
• Final Report
• Publication
• Code clean up & double-check
• Detailed statistical sensitivity analysis of the model

2016-10-25

• add pressure drop
• add radiation heat transfer He -> wall
• link streams
• test model at low T and phase change * works, but need to double-check certain cases without using c-wrappers in the loop
• make nominal values to be per stream
• make all constants into matrices
• run models for a long time
• report / presentation

Minor Things

• get rid of transpose in props wrappers
• do not re-calculate u_prev * don't think this is possible

2016-10-19

• basic 4-stream model, nothing in-between families of streams
• 4-stream model with conduction between families of streams
• 4-stream model with conduction and radiation between families of streams
• investigate two-phase flows
  • check using f-solve for the whole solution (re 2-phase flows)

2016-10-14

• optimized code
• get rid of all transposes in the code
• run radiation with high As to ensure there is warm up of both streams

2016-10-12

• scaled pressure drop
• scaled UA
• k as a function of temperature
• investigate a memory leak in Coolprop

2016-10-12

• Check that the current (and future) models support two-phase flows
• Add radiative heat transfer
  • Add radiative heat transfer between wall and an external body
• Run various models for a long time (until dHdt ~ 0)

2016-09-30

• for case with a wall - swap fluids, check consistency -- done, consistent
• for case with overlapping temperature plots:
  • plot Q[i]
  • try constrained solver with an extra condition: T[i+1] >= T[i]
• run the problem with liquid + gaseous phases without wall
• investigate how can we do the scaling for pressure drop and UA coefficient at a two-phase flow regime
• temperature distribution along the wall - as a separate vector -- after solver optimization
• make coolprop (http://www.coolprop.org/) work with MATLAB, compare performance

2016-09-07

• saturation curve
• implicit solver - use ode15i or finite difference method

2016-09-08

• play with time step, tolerances, iteration, etc
• change stage to slicing or smth that like,
• use more slices
• pull initial data to separate variables (eliminate penalties, e.g. static columns)
• find the function in refprop that determines quality of stream -- it's 'Q'

2016-09-26

• refprop wrapper
• COBYLA solver -- cancelled
• Better methods for dU/dt -- deferred
• Works towards everything in terms of P-H

ideas for future thinking & research

• use explicit equations of state (e.g. PRSV) instead of REFPROP
• try different solvers instead of standard fsolve

_could try fminsearch, fmincon _