Which Hydrogel Properties have an Incluence on the Cells?
Which Hydrogel Properties have an influence on the Printing fidelity
Name the different behaviours
A: Yield pseudoplastic
B: Bingham Body
C: Pseudoplastic (n < 1) (shear thinning)
D: Newtonian (n = 1)
E: Dilatant (n > 1) (shear thickening)
Give names & suggested units to the following abbreviations
• 𝐾
• 𝑛
• 𝑤̅
• 𝑅
• 𝜏
• 𝑟
• 𝐾 – Consistency Factor [Pa*s]
• 𝑛 – Flow exponent/ flow index []
• 𝑤̅ – Mean flow velocity [m/s]
• 𝑅 – Radius of nozzle [m]
• 𝜏 – Resulting Shear stress [Pa]
• 𝑟 – Position of calculation [m]
Give the general formulation for the shear stress calculation in steady flow.
Write it down!
Give the specific formulation for the max. shear stress calculation in steady flow.
How are n & K calculated?
Name two Hydrogels that are derrived from the body and their corsslinking mechanism?
Collagen (from ECM) —> Physical-Thermal
Gelatin —> Physical-Thermal
Fibrin (from blood plasms) —> Phyiscal-Enzymatic —> Addition of Thrombin
Name two Hydrogels that are natural but not derrived from the body and their crosslinking mechanisms?
Alginate —> Physical-Ionic (Ca2+/ CaCl)
Agarose —>Physical-Thermal
Name and example for a Hydrogel blend that tries to combine different positive aspects?
Give the formulation for the pressure drop over a pipe segment
How can you calculate tau_mean?
How can you calculate tau max and mean directly from the pressure drop?
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