Week 1- Mixing Tee
STEADY-STATE SIMULATIONS TO COMPARE THE MIXING EFFECTIVENESS WHEN HOT INLET TEMPERATURE IS 360C & THE COLD INLET IS AT 190C.
- CASE 1
- SHORT MIXING TEE WITH A HOT INLET VELOCITY OF 3M/S.
- MOMENTUM RATIO OF 2, 4.
- CASE 2
- LONG MIXING TEE WITH A HOT INLET VELOCITY OF 3M/S.
- MOMENTUM RATIO OF 2, 4.
CASE 1: SIMULATION OF SHORT PIPE
GEOMETRY: THE GEOMETRY IS IN STEP FILE FORMAT. IT IS ONLY PIPE TYPE GEOMETRY. BUT FOR FLUID FLOW ANALYSIS, WE HAVE TO EXTRACT THE VOLUME.
EXTRACTED VOLUME FROM PIPE GEOMETRY. HERE WE SUPRESSED THE OUTER BODY BECAUSE IT HAS NO SUCH USE IN CFD ANALYSIS.
MESH
MESHING IS PROCESS OF DISCRETIZATION. THE INFINITE VOLUME OF BODY IS CONVERTED INTO FINITE VOLUME BODY.
MORE THE NUMBER OF ELEMENT MORE THE EQUATION ARE FORMED MORE ACCURATE THE RESULTS. BUT IT TAKES MORE TIME TO SOLVE THE EQUATION THE WHOLE EQUATION.
HERE WE ARE USING TETRAHEDRON MESH WHICH IS UNSTRUCTURED MESH TYPE.
THE CUT SECTION OF THE BODY WHICH IS SHOWING THE INTERNAL PACKING STRUCTURE FOR THE EACH ELEMENT.
AFTER CREATING MESH, WE DEFINED THE SURFACE GEOMETRY TO THE SOFTWARE AND NAMED IR ACCORDING TO THE PROBLEM DEFINITION.
HERE WE USED
INLET_X
INLET_Y
OUTLET
WALL
BOUNDARY CONDITION
IN THIS B.C, FIRST CHECK THE QUALITY OF MESH. IF SOFTWARE SHOW ERROR, THEN WE HAVE DO IT AGAIN.
THE MAIN STEP FOR THE CFD ANALYSIS IS TO SELECT THE VISCOUS MODEL.
MODEL: K-EPSILON WITH RELIABLE AND STANDARD WALL FUNCTION.
THIS MODEL IS GENERALLY USED WHEN WE ARE INTERESTED TO FIND THE RESULT IN THE MIDDLE PORTION OF THE GEOMETRY.
THE NEXT STEP IS TO DEFINE THE INLET VELOCITY AND WORKING PRESSURE OF THE SYSTEMS.
INLET VELOCITY IN X DIRECTION: 3M/S
WITH TEMPERATURE OF 25 DEGREE CELSIUS.
INLET VELOCITY IN Y DIRECTION: 3M/S
WITH TEMPERATURE OF 10 DEGREE CELSIUS.
OUTLET PRESSURE: 0 BAR GAUGE PRESSURE
AFTER GIVING THE BOUNDARY CONDITION TO THE SOFTWARE WE HAVE TO DEFINE THE CONTOUR PLOTS FOR THE PARTICULAR PARAMETER SUCH AS TEMPERATURE AND PRESSURE.
SO HERE WE USED AREA WEIGHTED AVERAGE METHOD AND STANDARD DEVIATION METHOS FOR THE INTERESTED RESULTS.
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