Creating Interfaces between the Manikin and Cabin Regions

To simulate the thermal regulation of the manikin, you require thermal network interfaces between the fluid region for the cabin and the thermal network region for the manikin.

You account for the effects of the clothes of the manikin on the thermoregulation. The clothes pose a resistance to the sweat that evaporates from the body of the manikin to the enviroment. The clothes can also have a thermal insulation effect.

To differentiate between bare skin and clothes, you create interfaces for the part surfaces that represent bare skin, such as the head and hands, and for the part surfaces that are covered with clothes. In this tutorial, you also specify different clothing evaporative resistance and contact resistance values for different items of clothing, therefore, you require a separate interface for each item.

To create the interfaces:

Create the interfaces between the Manikin and Cabin regions. For this simulation, the manikin is wearing a shirt, shorts and trainers. Therefore, you require four different interfaces:

Expand the Regions node.
Multi-select the Cabin and Manikin nodes.
Right-click one of the selected nodes and select Create Interface.
Repeat the previous steps to create three more interfaces.

Expand the Interfaces node and rename the following nodes:


Node	Name
Cabin/Manikin	Bare Skin
Cabin/Manikin 2	Shirt
Cabin/Manikin 3	Shoes
Cabin/Manikin 4	Shorts

Expand the Interfaces node and set the following properties:


Node	Property	Setting
Shirt	Contacts	Cabin.Driver.Abdomen_Back/Abdomen_Back Cabin.Driver.Abdomen_Front_L/Abdomen_Front_L Cabin.Driver.Abdomen_Front_R/Abdomen_Front_R Cabin.Driver.L_Arm_Back_L/L_Arm_Back_L Cabin.Driver.L_Arm_Back_R/L_Arm_Back_R Cabin.Driver.L_Arm_Front_L/L_Arm_Front_L Cabin.Driver.L_Arm_Front_R/L_Arm_Front_R Cabin.Driver.L_Shoulder/L_Shoulder Cabin.Driver.R_Arm_Back_L/R_Arm_Back_L Cabin.Driver.R_Arm_Back_R/R_Arm_Back_R Cabin.Driver.R_Arm_Front_L/R_Arm_Front_L Cabin.Driver.R_Arm_Front_R/R_Arm_Front_R Cabin.Driver.R_Shoulder/R_Shoulder Cabin.Driver.Thorax_Back/Thorax_Back Cabin.Driver.Thorax_Front_L/Thorax_Front_L Cabin.Driver.Thorax_Front_R/Thorax_Front_R
Physics Values > Clothing Evaporative Resistance	Value	6.5 Pa-m^2/W
Physics Values > Contact Resistance	Value	0.077 m^2-K/W
Shoes	Contacts	Cabin.Driver.L_Foot_Sole/L_Foot_Sole Cabin.Driver.L_Foot_Top/L_Foot_Top Cabin.Driver.R_Foot_Sole/R_Foot_Sole Cabin.Driver.R_Foot_Top/R_Foot_Top
Physics Values > Clothing Evaporative Resistance	Value	18.2 Pa-m^2/W
Physics Values > Contact Resistance	Value	0.096 m^2-K/W
Shorts	Contacts	Cabin.Driver.L_Thigh_Back_L/L_Thigh_Back_L Cabin.Driver.L_Thigh_Back_R/L_Thigh_Back_R Cabin.Driver.L_Thigh_Front_L/L_Thigh_Front_L Cabin.Driver.L_Thigh_Front_R/L_Thigh_Front_R Cabin.Driver.Pelvis_Bottom/Pelvis_Bottom Cabin.Driver.Pelvis_L/Pelvis_L Cabin.Driver.Pelvis_R/Pelvis_R Cabin.Driver.R_Thigh_Back_L/R_Thigh_Back_L Cabin.Driver.R_Thigh_Back_R/R_Thigh_Back_R Cabin.Driver.R_Thigh_Front_L/R_Thigh_Front_L Cabin.Driver.R_Thigh_Front_R/R_Thigh_Front_R
Physics Values > Clothing Evaporative Resistance	Value	6.0 Pa-m^2/W
Physics Values > Contact Resistance	Value	0.062 m^2-K/W
Bare Skin	Contacts	Select the remaining 27 Cabin Wrap/Driver Contacts. Include the contacts for the following body parts: Face Head Left Calf Left Forearm Left Hand Neck Right Calf Right Forearm Right Hand

The values specified for clothing evaporative resistance and contact resistance come from experimental data [960]. You do not need to set these values for the bare skin interface. Simcenter STAR-CCM+ automatically accounts for this with the default value of 0.0 Pa-m^2/ W for Clothing Evaporative Resistance and 0.0 m^2-K/ W for Contact Resistance.

Save the simulation.