1. Mechanical Design Portfolio
Sina Mousavion
This is a brief overview of my endeavors in mechanical design and analysis, both professional and personal

2. S i n a M o u s a v i o n
Contents
1. Adaptive Magnet Holder for MagCheck Device – March 2014 ............................................................2
2. Aperture for Sorting Module – April 2014............................................................................................3
3. Optimizing the Rear part of Automobiles for a better Aerodynamic Achievement – July 2010..........4
4. Precise modeling of "Audi R8" exterior using surface modeling method – October 2013 ..................5

3. S i n a M o u s a v i o n
1. Adaptive Magnet Holder for MagCheck Device – March 2014
This Holder was designed for
Magnetworld Company to make sure
magnets of any size or shape could be
held at the center, or any arbitrary part of
the apparatus.
Holder consists of two separate pieces. A
slider and a L-shape Bracket. Slider can
freely move along the screw attached to
the table according to size of the magnet
and be fixed by tightening the screw. The
L-shape Bracket can turn along its axis to
the desired position according to magnet
shape. Thus, size and shape are accounted
for respectively. This holder gives magnets
two translational degrees of freedom on
the surface of the apparatus and a
constrained rotational degree of freedom if
required. All 3 movements can be
constrained, giving more room for precise
measurements. This design was later
fabricated at the CNC workshop of EAH
Jena and tested by the company. The result
was considered outstanding by the
company CEO.
CAD Magnet Holder Adaptor installed on the Apparatus
(The table is included for demonstrative purposes)
The Final Prototype

4. S i n a M o u s a v i o n
2. Aperture for Sorting Module – April 2014
MagnetWorld required an adaptive square opening that can let all sizes of magnets between 5mm-
30mm pass exactly through the center of the column.
For this task, Iris mechanism was chosen as
the starting point. An iris is a mechanism that
is used as a compact solution to close and
open holes. For this specific design number of
blades was chosen to be four. Edges of blades
are straight in order to achieve a square
aperture, a standard opening for normal
magnets yet a best fit for ring magnets as
well. Design consists of a plate (housing),
which is mounted on the sorting box using
four bolts, four blades, four levers and an
actuator.
The optimal blade shape and position of the
holes were chosen by try and error, in such a
way that there would be no gap between the
blades when they close and they can move easily inside the cylindrical housing. Blades are attached to
the housing using simple metallic pins to pivot. The flat heads of pins keep the assembly in place. Using
an actuator all four blades move simultaneously, making a square shape opening by their edges. The
actuator cane move using a M3 screw from outside. When the screw is tightened, a fixed desired size of
opening is acquired.
This assembly is installed on top of the sorting box replacing the previous opening. It’s crucial to install
this design in such way that its center is collinear with the detectors optical path. The following figures
demonstrate the design in three different stages between maximum and minimum opening.
(a) (b) (c)
CAD model view from top - Square Opening is acquired using the screw. Length (a) 0 mm (b) 15 mm (c) 30 mm
CAD model of the Aperture

5. S i n a M o u s a v i o n
3. Optimizing the Rear part of Automobiles for a better Aerodynamic
Achievement – July 2010
This thesis studied the behavior of the stream lines
and air pressure distribution at the rear part of
vehicles. Corresponding individual effects such as
Trailing Vortex, Horse Shoe Vortex, and Dead
Water Effect served as an introduction to the
physics of the project.
The sample car types chosen were family cars
(Sedan and Hatchback). Models were created in
SolidWorks. Thereafter a wind tunnel simulator
was set up within the interface of SolidWorks
using COSMOS FloWorks.
After the initial behavior of the flow was observed
and recorded, research was undertaken by studying
the effects of varying these individual specifications
-Trunk width, Boat tailing, slope of the rear
window, filleting the edges, etc. - and were
presented in separate graphs.
Based on the collated data, an optimized
remodeling of the cars was carried out. The result in
the wind tunnel simulation corresponded well with
the previously calculated data. And finally, further
solutions were proposed, which would help
improve the car’s aerodynamics and fuel consumption.
0.4
0.42
0.44
0.46
0.48
70 90 110
CD
lentgh (cm)
Graph indicates the relationship between Length of
the trunk and the Drag Coefficient
Peugeot 407 in the Wind Tunnel - Examples of Trailing
Vortexes

6. S i n a M o u s a v i o n
4. Precise modeling of "Audi R8" exterior using surface modeling
method – October 2013
This project was completed in one
month as a personal Project during
my master program. By applying
some minor modifications the final
CAD model should be able to serve
as a precise model for any CFD
simulation program.