ProtoDUNE-SP CFD Update Gregory Michna Stephen Gent Dillon - PowerPoint PPT Presentation

ProtoDUNE-SP CFD Update Gregory Michna Stephen Gent Dillon Pedersen Weston Christensen Cecilia Streff Department of Mechanical Engineering South Dakota State University July 18, 2019

ProtoDUNE Modeling Overview of Current Work: “Fine tuning” existing CFD model input parameters to best represent actual detector operation Dynamic Temp Probe Model Inputs Surface temperature: 87.59 K Liquid argon inlet temp: 88.16 K = Outlet + 0.2 K Liquid argon height: 7.50 m Outlet Liquid argon flow rate: 0.415 kg/s per pipe Static Temp Probe July 18, 2019 South Dakota State DUNE CFD Update 2

ProtoDUNE Modeling – Work to Date • Investigate inlet temperature effects for two cases: – Inlet = Surface + 0.2 K = 87.793 K – Inlet = Surface + 0.1 K = 87.693 K • Investigate flow rate effects : – Half of original flow rate (0.21 kg/s per pipe) July 18, 2019 South Dakota State DUNE CFD Update 3

Flow Rate (per inlet) Inlet Temperature ProtoDUNE Modeling 0.42 kg/s 87.693 K 0.42 kg/s 87.793 K 0.21 kg/s 87.793 K Pumps On Condition Static Probe Dynamic Probe 87.685 87.684 87.682 87.68 87.68 87.678 Temperature (K) 87.675 ST-S-ON 100mK Temperature (K) 87.676 ST-S-PON 100mK 87.67 87.674 ST-S-PON 200mK ST-S-PON 200mK 87.672 87.665 ST-S-PON 200mK, 87.67 ST-S-PON 200mK, 0.21kg/s 0.21kg/s 87.668 87.66 Experimental Experimental 87.666 87.655 87.664 0 1 2 3 4 5 6 7 8 0 1 2 3 4 5 6 7 8 Height (m) Height (m) July 18, 2019 South Dakota State DUNE CFD Update 4

Inlet Plane 1 (x = -3.06 m) Inlet = Surface + 0.2 K = 87.793 K Inlet = Surface + 0.1 K = 87.693 K Inlet = Surface + 0.2 K = 87.793 K 0.42 kg/s 0.42 kg/s 0.21 kg/s July 18, 2019 South Dakota State DUNE CFD Update 5

Inlet Plane 2 (x = -1.02 m) Inlet = Surface + 0.2 K = 87.793 K Inlet = Surface + 0.1 K = 87.693 K Inlet = Surface + 0.2 K = 87.793 K 0.42 kg/s 0.42 kg/s 0.21 kg/s July 18, 2019 South Dakota State DUNE CFD Update 6

Inlet Plane 3 (x = 1.02 m) Inlet = Surface + 0.2 K = 87.793 K Inlet = Surface + 0.1 K = 87.693 K Inlet = Surface + 0.2 K = 87.793 K 0.42 kg/s 0.42 kg/s 0.21 kg/s July 18, 2019 South Dakota State DUNE CFD Update 7

Inlet Plane 4 (x = 3.06 m) Inlet = Surface + 0.2 K = 87.793 K Inlet = Surface + 0.1 K = 87.693 K Inlet = Surface + 0.2 K = 87.793 K 0.42 kg/s 0.42 kg/s 0.21 kg/s July 18, 2019 South Dakota State DUNE CFD Update 8

Valencia Plane (x = 3.414 m) Inlet = Surface + 0.2 K = 87.793 K Inlet = Surface + 0.1 K = 87.693 K Inlet = Surface + 0.2 K = 87.793 K 0.42 kg/s 0.42 kg/s 0.21 kg/s July 18, 2019 South Dakota State DUNE CFD Update 9

Hawaii Plane (x = -1.978 m) Inlet = Surface + 0.2 K = 87.793 K Inlet = Surface + 0.1 K = 87.693 K Inlet = Surface + 0.2 K = 87.793 K 0.42 kg/s 0.42 kg/s 0.21 kg/s July 18, 2019 South Dakota State DUNE CFD Update 10

Temperature Contour Plots Along Horizontal Planes Flow Rate = 0.42 kg/s (per inlet) Height: 20 cm 40 cm 60 cm 30 cm 50 cm Inlet Temp 87.693 K 87.793 K July 18, 2019 South Dakota State DUNE CFD Update 11

Temperature Contour Plots Along Horizontal Planes Inlet Temp = 87.793 K 20 cm Height: 40 cm 60 cm 30 cm 50 cm Inlet Flow Rate (per inlet): 0.42 kg/s 0.21 kg/s July 18, 2019 South Dakota State DUNE CFD Update 12

ProtoDUNE Modeling – Work to Date • Revised Pumps Off Simulation – Adiabatic (not constant temp) pipes = improved dynamic profile from old solution Static Probe Dynamic Probe 87.65 87.648 87.648 87.646 87.644 87.646 Temperature (K) Temperature (K) 87.642 ST-S-POFF 87.644 ST-S-POFF 87.64 ST-S-POFF Adiabatic 87.642 ST-S-POFF Adiabatic Experimental 87.638 Experimental 87.64 87.636 87.638 87.634 87.636 87.632 0 1 2 3 4 5 6 7 8 0 1 2 3 4 5 6 7 8 Height (m) Height (m) July 18, 2019 South Dakota State DUNE CFD Update 13

ProtoDUNE Modeling – Work in Progress • Investigation of local fluid velocities & bulk flow pattern effects on existing solutions • Simulations with correct LAr height 7.406 m (not 7.5 m) July 18, 2019 South Dakota State DUNE CFD Update 14

ProtoDUNE Modeling – Future Work • Increased flow rate simulation (0.63 kg/s per Anselmo) • Other Boundary Condition studies as requested July 18, 2019 South Dakota State DUNE CFD Update 15