Use the vacuum. After returning to ambient pressure liquids "it self" will go in to.
But you should taking in to account wetting of your fibre/liquid couple.
Second way - vaporisation / condensation, may be at reduced pressure.
Temperature rising helps in high viscosity case.
good luck!
Helmut, thank you for Your voting.
I can offer one method: increased gravitation applying - use centrifuge, like for sediment separation. Centrifuges often used when necessary ensure form filling without bibles. Probably this method can be easiest for realisation, because lab centrifuge widely spread in labs. But be careful with rpm (or g) let'do not destroy your fibbers, but if you find centrifuge with smooth rpm adjustments you can easily find right mode. For decreasing viscosity use temp. A plenty field for experiments !!! :))
Good luck!
Capillary forces are crucial for success. http://en.wikipedia.org/wiki/Capillary_action http://en.wikipedia.org/wiki/Surface_tension http://chemwiki.ucdavis.edu/Physical_Chemistry/Physical_Properties_of_Matter/Bulk_Properties/Cohesive_And_Adhesive_Forces/Capillary_Action
Methods suggested by Andrei Shishkin works well if liquid can wet surface of fiber. For example, water in glass capillar. In polypropylene capillar it may be work if capillar is closed from one side. However, surface treatment is solution of wetting problem.
we simulated this phenomenon. It is a "special case" but I hope it might help
Article Surface Growth Effects On Reactive Capillary-Driven Flow: La...
If your fiber is electroconductive, you may implement electro osmosis effect.
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