1. From: On Development of a Semimechanistic Wall Boiling Model
Date of download: 10/22/2017
Copyright © ASME. All rights reserved.
From: On Development of a Semimechanistic Wall Boiling Model
J. Heat Transfer. 2016;138(6): doi: /
Figure Legend:
The computational domain used to validate the present model. To mimic the experiments [14], a similar domain size is used. Simulations are performed at three different channel cross sections to check the effects of channel height on boiling heat transfer.

2. From: On Development of a Semimechanistic Wall Boiling Model
Date of download: 10/22/2017
Copyright © ASME. All rights reserved.
From: On Development of a Semimechanistic Wall Boiling Model
J. Heat Transfer. 2016;138(6): doi: /
Figure Legend:
Comparison between the experimental data [14] and the present numerical results at 90 °C coolant inlet temperature; 1, 2, and 3 bar (absolute) operating pressures, inlet plug flow velocities of (a) 0.25 m/s, (b) 0.5 m/s, and (c) 1 m/s. Channel height = 10 mm.

3. From: On Development of a Semimechanistic Wall Boiling Model
Date of download: 10/22/2017
Copyright © ASME. All rights reserved.
From: On Development of a Semimechanistic Wall Boiling Model
J. Heat Transfer. 2016;138(6): doi: /
Figure Legend:
Comparison between the experimental data [14] and the numerical results at 3 bar (absolute) operating pressure; coolant inlet temperatures of 90 °C and 120 °C with inlet plug velocities of (a) 0.5 m/s and (b) 1 m/s. Channel height = 10 mm.

4. From: On Development of a Semimechanistic Wall Boiling Model
Date of download: 10/22/2017
Copyright © ASME. All rights reserved.
From: On Development of a Semimechanistic Wall Boiling Model
J. Heat Transfer. 2016;138(6): doi: /
Figure Legend:
The effect of the channel height. Inlet plug velocity = 0.25 m/s, operating pressure = 2 bar (absolute), coolant inlet temperature = 90 °C, and channel height = 10 mm, 25 mm, and 58 mm.

5. From: On Development of a Semimechanistic Wall Boiling Model
Date of download: 10/22/2017
Copyright © ASME. All rights reserved.
From: On Development of a Semimechanistic Wall Boiling Model
J. Heat Transfer. 2016;138(6): doi: /
Figure Legend:
The effect of channel shape. Comparison between the experimental [14] and the numerical results at 1 bar absolute pressure, coolant temperature of 90 °C, and inlet plug velocity of 0.25 m/s for different channel shapes: convex and concave. Channel height = 10 mm.

6. From: On Development of a Semimechanistic Wall Boiling Model
Date of download: 10/22/2017
Copyright © ASME. All rights reserved.
From: On Development of a Semimechanistic Wall Boiling Model
J. Heat Transfer. 2016;138(6): doi: /
Figure Legend:
Contour plots of the vapor volume fraction for inlet velocity = 0.5 m/s, inlet temperature = 90 °C, and operating pressure = 1 bar (Tsat = 108 °C), with varying wall temperatures: (a) 100 °C, (b) 120 °C, (c) 130 °C, and (d) 137 °C. Channel height = 10 mm. As expected with increasing the wall temperature, the vapor formation also increased.

7. From: On Development of a Semimechanistic Wall Boiling Model
Date of download: 10/22/2017
Copyright © ASME. All rights reserved.
From: On Development of a Semimechanistic Wall Boiling Model
J. Heat Transfer. 2016;138(6): doi: /
Figure Legend:
Contour plots of the vapor volume fraction for inlet temperature = 90 °C, operating pressure = 1 bar, and wall temperature = 130 °C with different inlet velocities of (a) 0.25 m/s, (b) 0.5 m/s, and (c) 1 m/s. Channel height = 10 mm. With increasing the bulk velocity, the vapor formation decreases, i.e., suppression of the nucleate boiling.

8. From: On Development of a Semimechanistic Wall Boiling Model
Date of download: 10/22/2017
Copyright © ASME. All rights reserved.
From: On Development of a Semimechanistic Wall Boiling Model
J. Heat Transfer. 2016;138(6): doi: /
Figure Legend:
The geometry of a typical EGR cooler used in the numerical simulation. EGR cooler is a one kind of shell and tube heat exchanger used to decrease the temperature of the exhaust gas. To perform the conjugate heat transfer analysis, both the shell (casing) and the tubes are meshed (i.e., numerically resolved) along with two separate fluid zones: coolant and exhaust gas.

9. From: On Development of a Semimechanistic Wall Boiling Model
Date of download: 10/22/2017
Copyright © ASME. All rights reserved.
From: On Development of a Semimechanistic Wall Boiling Model
J. Heat Transfer. 2016;138(6): doi: /
Figure Legend:
(a) Contour plots of the coolant velocity at the cut-plane. (b) and (c) Contour plots of the vapor volume fraction at the cut-plane and the coolant side surface of the tubes, respectively. In the stagnation zone (zone B in the figure), the high tube wall temperature causes the high vapor formation that is prone to an uncontrolled boiling situation.

10. From: On Development of a Semimechanistic Wall Boiling Model
Date of download: 10/22/2017
Copyright © ASME. All rights reserved.
From: On Development of a Semimechanistic Wall Boiling Model
J. Heat Transfer. 2016;138(6): doi: /
Figure Legend:
(a) Coolant side wall temperature distribution. A high-temperature hot spots are found in the stagnation zone. (b) and (c) The temperature distribution at the cut-plane and the outer casing of the EGR cooler. The wall temperature distribution at the solid wall can be used as an input for an accurate solid thermal stress and/or fatigue analysis.