Mahdi  EsmailyStanford  University

Center  for  Turbulence  Research

HPC  meeting,  Feb  7-­8,  2017

Multi-­Physics  Methods,  Modeling,  Simulation  &  Analysis

From  application  to  new  solutions

Application

Physical  modeling

Governing  equations HPC

Optimization  analysis

New  solutions

Application:  Cardiovascular  modeling

Congenital  heart  disease

Patient-­specific  modeling

Multiscale  modeling

Fluid-­solid  interaction  simulations

Systemic  oxygen  delivery:

𝐽"(𝑑) =  𝑂𝐷(𝑑)𝑉+,

=𝐶.𝑉+,

−1

𝑄. 𝑑𝑄"(𝑑)

Coronary  oxygen  delivery:

𝐽2(𝑑) =  𝑂𝐷2(𝑑)𝑉+,

=𝐶.𝑉+,

−1

𝑄. 𝑑𝑄2(𝑑)

Optimization  results

1%Improvement  in  oxygen  delivery

0.5%Improvement  in  coronary  OD

Standard3.5  mm  BT-­shunt

Going  back  to  the  basics

Ejector  pump

New  solutions:  a  novel  surgery

Application:  renewable  energy

Particle-­based  solar  receiver

Physical  modeling

Soleil-­MPI

• Variable  density  incompressible  formulation

• Discrete-­ordinate  method  for  radiation  transport

• Lagrangian point-­particles  with  collison modeling  • Non-­uniform  structured  rectilinear  mesh

• Internal  geometric  multigrid  solver

• Object  oriented  Fortran  2003

• Parallel  (distributed  memory)

• Tested  with  over  a  billion  grid  cells  and  particles

• Scales  to  Titan  full  capacity  

Fluid  flowRadiation  transport

Lagrangianparticles

Analysis

Temperature

Velocity

Predicted  near-­wall  temperature

8 m/s

4 m/s

2 m/s

Learned  lessons

With  collision  modeling   Without  collision  modeling